allocate with the vm_cache locked - this is necessary to be able to steal pages
from itself (large files...).
The system doesn't actually lock up anymore, but it still renders itself unusable;
obviously the page thief does not work correctly, yet. The rest of the experience
is created by our current scheduler (the page thief runs and runs, but it doesn't
free any pages anymore).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22466 a95241bf-73f2-0310-859d-f6bbb57e9c96
twice into the same cache: cache_io() called read_into_cache() (or
write_to_cache()), and that broke down the request into smaller parts.
It then called read_chunk_into_cache() (or write_chunk_to_cache() resp.)
to actually allocate pages and fulfill the request.
However, it needed to unlock the cache for each chunk, and in the mean
time someone else could insert pages into the remaining chunks.
* Now, cache_io() already takes care of chunking the data which makes this
approach safe, and also simplified the code a bit - read_into_cache()/
write_to_cache() are gone now. I've renamed read_chunk_into_cache() to
read_into_cache() (same for the write function).
* Also got rid of that goto in that function while I was on it.
* Disabled cache_prefetch_vnode() for now (it's similar to cache_io(), but
since it's currently not used [since no cache module is installed yet],
I didn't want to go through updating it now, too).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22465 a95241bf-73f2-0310-859d-f6bbb57e9c96
* his has to be used by the page writer to make sure the vnode is still valid.
* This should have been the final nail on the Luposian bug - I haven't tested
it yet, but we'll certainly see :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22462 a95241bf-73f2-0310-859d-f6bbb57e9c96
heap is going away soon, it doesn't hurt to have it in the repository.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22457 a95241bf-73f2-0310-859d-f6bbb57e9c96
interfere with the page thief, we always need to have reserved a page for
this upfront. I introduced a function to the vm_translation_map layer that
estimates how much pages a mapping might need at maximum. All functions that
map a page now call this and reserve the needed pages upfront.
It might not be a nice solution, but it works.
* The page thief could run into a panic when trying to call vm_cache_release_ref()
on a non-existing (NULL) cache.
* Also, it will now ignore wired active pages.
* There is still a race condition between the page writer and the vnode
destruction - writing a page back needs a valid vnode, but that might just
have been deleted.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22455 a95241bf-73f2-0310-859d-f6bbb57e9c96
mjw for the hint. Fixes bug #1516.
* Changed _{kern,user}_create_symlink() to no longer check the supplied
link string. BeOS seems to do that, but this is not standard
conforming. The previous implementation even used the path processed
by check_path(), which would potentially have appended a ".".
* Some style cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22451 a95241bf-73f2-0310-859d-f6bbb57e9c96
(currently, wired pages don't always have the PAGE_STATE_WIRED, but a
wired_count).
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* Corrected checking of parameters (name).
* Gracefully deals with disk systems that rescan after initialization,
now.
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system initialize() hooks. It's often the only info about the
partition one needs and thus locking the partition just to get it is
no longer necessary.
* intel partitioning system:
- Removed passing around block sizes. We require 512 byte sectors
anyway. In fact using the parent partition's block size was even
wrong.
- Simplified writing the partition map sector.
- Simplified and corrected the partition map initialization.
- We don't fail identifying a partition anymore, if the partition map
contains no partitions. We would never identify a freshly
initialized partition map before.
- Made pm_identify() more intelligent: It determines the priority to
return depending on whether the partition is the device itself and
whether we have recognized child partitions.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22447 a95241bf-73f2-0310-859d-f6bbb57e9c96
the unmapped page.
* This is needed by everyone who calls this to make sure modifications to a
page aren't ignored. Namely, the page scanner and the page thief were
affected.
* Cleaned up locking the page's cache a bit in page_thief(); there is now
a helper class that takes care of everything.
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* Made the kernel rootfs reusable by the FS Shell and removed the
copy in the FS Shell sources.
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* the page writer don't allow to block, while all other writers do. This fixes
bug #1509. The reason the page writer needs this is because it marks several
pages from different caches as busy.
* Fixed a warning about ASSERT being defined already in BFS, since
util/DoublyLinkedList.h now includes debug.h.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22434 a95241bf-73f2-0310-859d-f6bbb57e9c96
team as well. Otherwise the children would later try to remove them from
a list they weren't in.
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dprintf() with the exception that it doesn't write anything to the
syslog. The reason is that syslog_write() releases a semaphore and can
therefore not be invoked when the thread spinlock is held.
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vfs_select.h, respectively moved most of it into the new kernel
private header wait_for_objects.h.
* Added new experimental API functions wait_for_objects[_etc](). They
work pretty much like poll(), but also for semaphores, ports, and
threads.
* Removed the "ref" parameter from notify_select_events() and the
select_sync_pool functions as well as from fd_ops::fd_[de]select(). It
is no longer needed. The FS interface select() hook still has it,
though -- the VFS will always pass 0.
* de]select_fd() take a select_info* instead of a select_sync* + ref
pair, now. Added respective functions for semaphores, ports, and
threads.
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could be written back. This should stop the page thief from stealing active
pages that cannot be recreated easily :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22404 a95241bf-73f2-0310-859d-f6bbb57e9c96
the death stack and reacquiring the thread lock in which another thread
could snatch our stack that we were still going to use for the
scheduler. Now we've got a second spinlock that we can hold while
releasing a semaphore.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22403 a95241bf-73f2-0310-859d-f6bbb57e9c96
and thread spinlock was reverse in Wait() and Notify(). The thread lock
is now the outer lock -- this way it is still possible to call Notify()
with the thread lock being held.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22401 a95241bf-73f2-0310-859d-f6bbb57e9c96
* In select_fd(): First get the file descriptor, then check whether any
events have to be selected at all. This has the advantage that the
caller can interpret an error return code as invalid FD. Consequently
common_poll() no longer checks FD validity separately -- this was a
race condition.
* common_poll() always selects POLLERR and POLLHUP now, which it has to
do according to the specs.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22400 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Reworked the select support:
- The io_context additionally stores a table of lists of select_infos,
which enables it to deselect events of a pending select() when
closing a FD. This prevents a race condition potentially causing a
write to stale memory.
- The opaque selectsync* passed to FSs is now actually a select_info*.
This was necessary, since the FDs deselect() hook (unlike the
select() hook) doesn't take a "ref" argument and deselecting a
single info (e.g. caused by a premature close()) was not possible.
The select() hook's "ref" argument has become superfluous.
- It should now be relatively easy to implement a poll_on_steroids()
that can also wait for objects other than FDs (e.g. semaphores,
ports, threads etc.).
* Set/reset the signal mask in common_select(). This makes pselect()
work as required.
* Reorganized vfs_resize_fd_table().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22391 a95241bf-73f2-0310-859d-f6bbb57e9c96
necessary because low memory handlers might need to wait for other services
while we need to make sure the page thief can always steal pages.
* Made the page thief more aggressive when memory is critical: added a third
run where it will also steal a small amount of active pages to keep things
going.
* The page thief did not maintain the cache's reference correctly in all
situations.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22382 a95241bf-73f2-0310-859d-f6bbb57e9c96
writers.
* Removed the optimization for piping data between two threads of the
same team. This greatly simplifies the code. It seems to me the case
is very uncommon; it could be added back later, though.
* Basically rewrote reading from and writing to the pipe:
- A blockable writer can now write more than what is currently
available in the ring buffer.
- Writing respects the PIPE_BUF non-interleaving limit, though our
headers don't seem to define PIPE_BUF anywhere.
- Unblock writers, when the last reader is gone and send those that
haven't written anything yet a SIGPIPE. Fixes bug #1476.
* Correctly implemented select() support. We were only notifying
writers. We manage two separate select sync pools per pipe now: one
for the reader end and one for the writer end.
* Reading/writing from the root dir does no longer end in KDL.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22378 a95241bf-73f2-0310-859d-f6bbb57e9c96
components - now, we divide the initialization of that service into two parts
which allows this (before, most handlers were gone after boot).
* Added debugger command that dumps the low memory handlers.
* The slab allocator now registers its low memory handler with a higher
priority, so that it'll run before the potentially heavier ones.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22374 a95241bf-73f2-0310-859d-f6bbb57e9c96
inserted into the list according to their priority; higher priority
handlers are now called first.
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Apparently not everyone checks the page state for PAGE_STATE_BUSY.
vm_page_write_modified_pages() does now at least.
* Fixed typos in comments.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22349 a95241bf-73f2-0310-859d-f6bbb57e9c96
* We now have a page writer that takes some pages from the modified queue
and writes it back every few seconds. It can be triggered by the page
scanner to do that more often, though. That mechanism can be greatly
improved once we have our I/O scheduler working.
* Removed vm_page_write_modified_page() again - it was all "eaten up" by
the page writer.
* Reworked vm_page_write_modified_pages() a bit: it now uses
vm_test_map_modification() and vm_clear_map_flags() instead of the
iterating over all areas which wouldn't even work correctly.
The code is much simpler now, too.
* You usually put something to the tail of a queue, and remove the contents
from the head, not vice versa - changed queue implementation to reflect this.
* Additionally, there is now a enqueue_page_to_head() if you actually want the
opposite.
* vm_page_requeue() allows you to move a page in a queue to the head or tail.
* Replaced vm_clear_map_activation() with vm_clear_map_flags() which allows
you to clear other flags than PAGE_ACCESSED.
* The page scanner dumps now some arguments with each run.
* Removed the old disabled pageout_daemon() from NewOS.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22348 a95241bf-73f2-0310-859d-f6bbb57e9c96
arguments into vm.h.
* This should fix the broken build from earlier - thanks Stefano for the note!
* That also allowed to clean some other includes a bit.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22331 a95241bf-73f2-0310-859d-f6bbb57e9c96
to the private VM types are including vm_types.h now.
* Removed vm_page, vm_area, vm_cache, and vm_address_space typedefs; it's
cleaner this way, and the actual types are only used in C++ files now,
anyway.
* And that caused changes in many files...
* Made commpage.h self-containing.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22329 a95241bf-73f2-0310-859d-f6bbb57e9c96
in enqueue_page() - it doesn't really belong there.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22328 a95241bf-73f2-0310-859d-f6bbb57e9c96
For some reason, shell wildcards do not include deleted files... :)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22327 a95241bf-73f2-0310-859d-f6bbb57e9c96
opaque types for C.
* As a result, I've renamed some more source files to .cpp, and fixed
all warnings caused by that.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22326 a95241bf-73f2-0310-859d-f6bbb57e9c96
introduced a new vm_page_write_modified_page().
* Resolved a TODO: vm_page_write_modified_pages() did not mark a to be
written page busy but unlocked its cache which could let someone else
steal that page in the mean time.
* Moved the logic when to move a page to the active or inactive queue to
a new function move_page_to_active_or_inactive_queue().
* Moved page_state_to_string() to vm_page(); it's now also used by the
"page" and "page_queue" KDL commands.
* Made the output of the "page_queue list" command more useful.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22323 a95241bf-73f2-0310-859d-f6bbb57e9c96
is tracked while the page scanner runs much slower. Now, we just set it to a
fixed positive, so that they can easily age in case they are actually unused.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22320 a95241bf-73f2-0310-859d-f6bbb57e9c96
are locked, there is now a vm_page_reserve_pages() call to ensure upfront that
there is a page for me when I need it, and may have locked some caches.
* The vm_soft_fault() routine now makes use of that feature.
* vm_page_allocate_page() now resets the vm_page::usage_count, so that the file
cache does not need to do this in read_chunk_into_cache() and
write_chunk_to_cache().
* In cache_io() however, it need to update the usage_count - and it does that
now. Since non-mapped caches don't have mappings, the page scanner will punish
the cache pages stronger than other pages which is accidently just what we
want.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22319 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Removed the vm_cache/vm_store ref_count duality that besides being a bit ugly
also created the page dameon cache retrieval problem: now, only areas (and
cache consumers) retrieve a reference to the store (and therefore, the vnode).
The page daemon doesn't need to care about this at all anymore, and the pseudo
references of the vm_cache could be removed again.
* Rearranged deletion of vnodes such that its ID can be reused directly after
fs_remove_vnode() has been called.
* vm_page_allocate_page() no longer panics when it runs out of pages, but just
waits for new pages to become available using the new sFreeCondition condition
variable - to make sure this happens in an acceptable time frame, it'll
trigger a run of the low memory handlers.
* Implemented a page_thief() that steals inactive pages from caches and puts
them into the free queue. It runs as a low memory handler.
* The file cache now sets the usage count on the pages it inserts into the
cache (needs some rework though, cache_io() doesn't do it yet).
* Instead of panicking, the kernel will currently dead lock in low memory
situations, since BFS does a bit too much in bfs_release_vnode().
* Some minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22315 a95241bf-73f2-0310-859d-f6bbb57e9c96
* The page daemon now runs independently from the low memory state.
* It now also increases its frequency and scanned pages, as well as decreases
the interval between runs with increasing memory pressure.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22314 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_low_memory() no longer calls call_handlers() directly, but just triggers
a run immediately.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22313 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Replaced release_sem() with release_sem_etc() for future addition of the
B_DO_NOT_RESCHEDULE flag.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22308 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed vm_page_allocate_page_run(): it did not take the pageState into account,
and would therefore return uninitialized memory (ie. B_CONTIGUOUS areas would
contain garbage).
Now, it stores if a page is cleared in a new vm_page::is_cleared field.
* Some cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22306 a95241bf-73f2-0310-859d-f6bbb57e9c96
freshly booted, it would already contain > 20000 pages. The size is
now initialized to half of the available pages. Ideally it would
grow/shrink dynamically, though.
* Changed the hash function to yield a better distribution.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22211 a95241bf-73f2-0310-859d-f6bbb57e9c96
diagnostic purposes).
* hash_init() adjusts the table size to a prime number, which should
result in a better element distribution, particularly since usually a
power of two is passed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22210 a95241bf-73f2-0310-859d-f6bbb57e9c96
reference count to drop below 0 there.
* Added TODO describing a serious race condition between free_vnode()
and the page daemon.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22209 a95241bf-73f2-0310-859d-f6bbb57e9c96
a reference to a by them not yet referenced cache was not correct.
They only incremented the reference count, but a vnode cache reference
includes also a vnode reference. In case of the page daemon this would
cause vnode references to be lost (causing bug #1465).
* The page daemon used an unsafe method to access a yet unreferenced
page cache. There was nothing that prevented the cache from being
deleted while the page daemon tried to get a reference. The
vm_page::cache field is now protected by the page cache table
spinlock, too, which the new function
vm_cache_acquire_page_cache_ref(), used by the page daemon, also
acquires while trying to get the reference.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22208 a95241bf-73f2-0310-859d-f6bbb57e9c96
increment the root node vnode reference count. Otherwise it could race
with fs_unmount(). Fixes bug #1438.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22203 a95241bf-73f2-0310-859d-f6bbb57e9c96
group ID with the session and let the terminal update them.
* Added an "orphaned" flag to the process_group structure and code to
maintain it.
* Handle the death of a controlling process correctly: The
foreground process group gets a SIGHUP and all newly-orphaned process
groups containing at least one stopped processes are sent
SIGHUP+SIGCONT.
* The tty handles the O_NOCTTY flag correctly, now.
* The tty handles reads/writes from processes from other sessions
correctly, now.
* Handle tcsetpgrp() from background processes correctly.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22187 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Defined flag SIGNAL_FLAG_TEAMS_LOCKED for send_signal_etc(), so it can
be called with the team lock being held.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22186 a95241bf-73f2-0310-859d-f6bbb57e9c96
shadowing variables).
* Resolved TODO: We wake up the parent if waiting in wait_for_child()
now, if the process group changes.
* Added another TODO: setpgid() is supposed to fail on a child after
it has executed exec*().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22185 a95241bf-73f2-0310-859d-f6bbb57e9c96
blocked and no other child status is available.
* Respect SA_NOCLDWAIT and ignored SIGCHLD in waitpid(): Unless a child
status is available immediately, the thread shall block until all
children are gone.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22161 a95241bf-73f2-0310-859d-f6bbb57e9c96
* The vm_translation_map is now correctly held in all of the vm_ mapping
functions.
* Removed the old vm_daemons.c file - there is now a new vm_daemons.cpp
which contains the beginnings of our new page daemon.
So far, it's pretty static and not much tested. What it currently does
is to rescan all pages in the system with a two-handed clock algorithm
and push pages into the modified and inactive lists.
* These inactive pages aren't really stolen yet, even though their mappings
are removed (ie. their next access will cause a page fault). This should
slow down Haiku a bit more, great, huh? :-)
* The page daemon currently only runs on low memory situations, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22156 a95241bf-73f2-0310-859d-f6bbb57e9c96
correct values (resolving a TODO); however, the latter doesn't do anything
with those yet.
* Cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22154 a95241bf-73f2-0310-859d-f6bbb57e9c96
kernel debugger commands, which can set/clear/list in-kernel break- and
watchpoints. Only available when KERNEL_BREAKPOINTS is defined.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22153 a95241bf-73f2-0310-859d-f6bbb57e9c96
DEBUG_CACHE_LIST) that prints an unspectacular list of pointers to all
existing caches. Feel free to extend.
* Enhanced MultiAddressSpaceLocker:
- It supports choosing between read and write lock per address space,
now.
- Added AddAreaCacheAndLock(), which adds the address spaces of all
areas that are attached to a given area's cache, locks them, and
locks the cache. It makes sure that the area list didn't change in
the meantime and optionally also that all areas have their
no_cache_change flags cleared.
* Changed vm_copy_on_write_area() to take a cache instead of an area,
requiring it to be locked and all address spaces of affected areas to
be read-locked, plus all areas' no_cache_change flags to be cleared.
Callers simply use MultiAddressSpaceLocker:: AddAreaCacheAndLock() to
do that. This resolves an open TODO, that the areas' base, size, and
protection fields were accessed without their address spaces being
locked.
* vm_copy_area() does now always insert a cache for the target area. Not
doing that would cause source and target area being attached to
the same cache in case the target protection was read-only. This
would make them behave like cloned areas, which would lead to trouble
when one of the areas would be changed to writable later.
* Fixed the !writable -> writable case in vm_set_area_protection(). It
would simply change the protection of all mapped pages for this area,
including ones from lower caches, thus causing later writes to the
area to be seen by areas that shouldn't see them. This fixes a problem
with software breakpoints in gdb. They could cause other programs to
be dropped into the debugger.
* resize_area() uses MultiAddressSpaceLocker::AddAreaCacheAndLock() now,
too, and could be compacted quite a bit.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22152 a95241bf-73f2-0310-859d-f6bbb57e9c96
Condition variables would never be interrupted.
* ConditionVariableEntry::Add() did not correctly insert the entry into
the per-thread list of entries (the next link of the previous entry
was not adjusted), which could leave the entry unnotified when the
previous entry was notified, thus leaving it in the respective
condition variable's list after the end of its life time. This should
fix a crashing bug I rarely encountered.
* Added debug checks in the PrivateConditionVariableEntry
constructor/destructor that should have helped me to find
forementioned bug hours earlier, had I been bright enough to realize
that I didn't include <debug.h> and those KDEBUG guarded checks were
never executed. :-/
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22151 a95241bf-73f2-0310-859d-f6bbb57e9c96
Can be enabled by defining KERNEL_BREAKPOINTS in arch/user_debugger.h
and will provide the arch_{set,clear}_kernel_{break,watch}point()
function. Hitting a break-/watchpoint will throw the thread into KDL.
* Finally added a comment, what's the point of
i386_reinit_user_debug_after_context_switch(), since I wonder every
time I see it. Should be optimized aways soon.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22150 a95241bf-73f2-0310-859d-f6bbb57e9c96
space - but they were released upon deletion. It's probably not really
needed, but now all reserved areas also grab a reference to their address
space.
* Rearranged team tear down to be a bit more sane: the I/O context is removed
first (where semaphores/areas/ports/whatever might still be used), and the
address space is deleted last.
* delete_area() can now remove its address space reference again (due to the
two changes above), and therefore fixes bug #1374.
* cleaned up vm_address_space.c a bit (no functional change there, though).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22130 a95241bf-73f2-0310-859d-f6bbb57e9c96
stack frame (i.e. its own). Not sure what the comment is supposed to
mean. Tested with gcc 2 and 4.
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removed from the variable, which could lead to crashes under certain
cicrumstances.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22090 a95241bf-73f2-0310-859d-f6bbb57e9c96
is used instead of death_entry for team::dead_children.
* Added team::{stopped,continued}_children, which, analoguously to
dead_children, are used to track the state of stopped/continued
children.
* A team does have a job_control_entry, which is allocated at team
creation time. It will be inserted into the parent's
{stopped,continued}_children lists as the team's main thread is
stopped/continued and removed when waitpid() retrieves the child
state. When the team dies the entry is detached from the team and goes
into the parent's dead_children list.
* Removed the wait_for_any field from team_dead_children. It was solely
used to avoid deletion of the contained entries in certain situations.
wait_for_child() (the waitpid() backend) always deletes an entry now,
regardless of whether other threads are waiting; that's in
accordance with the waidpid() specification. wait_for_thread() removes
the entry only, if the caller is the parent of the respective team.
* Introduced team_set_job_control_state() which performes the job
control entry transitions between the respective lists and wakes up
threads waiting in wait_for_child(). It is invoked on team death and
when the team's main thread receives job control signals.
* Reorganized wait_for_child(). It handles WCONTINUED and WUNTRACED now,
too. Removed a block that interpreted the supplied ID as thread ID.
* Added missing parts in waitpid().
Job control starts to work, though it seems to have some glitches.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22088 a95241bf-73f2-0310-859d-f6bbb57e9c96
variable. Due to C code including the header I had to turn it from and
aggregated member to a pointer. I'm very close to starting to convert
all remaining .c to .cpp files. :-/
* Got rid of the "waiters" field. It was only written, never read.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22084 a95241bf-73f2-0310-859d-f6bbb57e9c96
exists and thread was notified), B_ENTRY_NOT_FOUND (condition variable
not found or Unpublish()ed while waiting), or B_INTERRUPTED
(interrupted by a signal).
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* Removed left-over commented C implementation.
* It is now possible for a thread to wait for more than one condition
variable at a time.
* Made waiting for condition variables optionally interruptable.
* Renamed Notify() method to NotifyAll() and added a NotifyOne(), so
that it is now possible to wake up only one of the waiting threads.
Pretty much untested at the moment.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22081 a95241bf-73f2-0310-859d-f6bbb57e9c96
content name are supported.
* Added file_system_module_info::flags (analogously to
partition_module_info::flags) which indicate which disk device
features the FS supports.
* Replaced the
file_system_module_info/partition_module_info::supports_*()
hooks by a get_supported_operations() hook and for partitioning
systems additionally a get_supported_child_operations() hook.
* Updated file and partitioning systems accordingly.
* Updated fs_shell accordingly.
* Updated the DDM accordingly. The syscall interface remains unchanged,
though.
* _user_supports_initializing_partition() also checks whether the parent
partitioning system is content now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22043 a95241bf-73f2-0310-859d-f6bbb57e9c96
Also check for negative positions smaller -1
(as -1 means using current address).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22031 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_soft_fault() no longer touches the page source cache in case fault_get_page() failed.
* fault_find_page() now unlocks and releases the cache if reading in a page failed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22016 a95241bf-73f2-0310-859d-f6bbb57e9c96
occured if SIGSTOP was already delivered but not yet handled when SIGCONT was
sent. Now, SIGCONT will clear all stop signals from the pending signals.
* SIGTSTP, SIGTTIN, and SIGTTOU are supposed to suspend the thread as well, adapted
the default behaviour to respect that.
* Removed the work-around from r21997 TermParse.cpp for this exact problem.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22004 a95241bf-73f2-0310-859d-f6bbb57e9c96
* get_signal_stack() checked the wrong sig_action field (index is signal-1), also,
it had an off-by-one error in the stack range check.
* factored out a restart_syscall() function to avoid code duplication
* arch_setup_signal_frame() relied on the fact that vregs and the signal stack code
is a multiple of 4 bytes in size.
* Fixed sigaction(): it did return the error code directly instead of setting errno.
* signal() actually had a work-around for the broken sigaction()...
* Replaced the sig_func_t typedef with a sighandler_t typedef - this is non-standard
anyway, but now we're at least compatible with the GNU world instead of introducing
our own solution (BSD seems to use sig_t here, BTW).
* Removed now unused sigval structure from the header; it should be added again as
soon as we start supporting it.
* SA_RESETHAND and SA_ONESHOT are the same thing; the former did not work before.
* Made the non-standard SA_* flags refer to the standard ones instead of the other
way around.
* Added a test application for various signal features - works fine under Haiku,
tested also under Linux and BeOS (the latter fails as it does not support SA_RESTART).
More tests should be added, though.
* Cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21999 a95241bf-73f2-0310-859d-f6bbb57e9c96
* On exec() the new function thread_reset_for_exec() is called which clears the signals
and cancels an eventually set alarm. Both things weren't done before...
* Some minor cleanups.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21989 a95241bf-73f2-0310-859d-f6bbb57e9c96
large) vregs structure to the stack.
* Introduced a get_signal_stack() function that arch_setup_signal_frame() now uses to setup
the signal frame - it currently only returns the default user thread stack. Also made
sure arch_setup_signal_frame() is independent from the user stack.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21983 a95241bf-73f2-0310-859d-f6bbb57e9c96
if the page was already in the "modified" list before. Also, the source page (which is
either mapped directly or copied to the target page) is no longer marked busy before its
final destiny is decided (it didn't have any effect, anyway, since we had its cache
locked for the whole time, but it now preserves the modified state). This fixes bug #1369.
* vm_cache_write_modified() now filters out temporary caches (it's currently called on area
deletion).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21971 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Pulled the actual tree code into a non-templatized class AVLTree to
reduce the amount of code generated each time the template is
instantiated.
* Changed the iterator interface to Java-style.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21892 a95241bf-73f2-0310-859d-f6bbb57e9c96
since fault_find_page() does no longer insert a dummy page into a cache
that has a store from which it can read the page.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21887 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Removed a few instances where the page state was set busy directly after
allocating it. This is a no-op, since a page is always busy after
allocation.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21875 a95241bf-73f2-0310-859d-f6bbb57e9c96
cheap means to block threads until notified explicitely.
threads
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21874 a95241bf-73f2-0310-859d-f6bbb57e9c96
it's reference to the vm_address_space - luckily, it doesn't even need a
reference, since it always runs in the current address space, which cannot
go away for obvious reasons.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21865 a95241bf-73f2-0310-859d-f6bbb57e9c96
* fixes a dead lock in vm_soft_fault() - the locking scheme enforces you to
lock the address space before a vm_cache, not the other way, around. Since
we need to lock the cache that has our page in fault_get_page(), we violated
that scheme by relocking the address space in order to get access to the
vm_area. Now, we read lock the address space during the whole page fault;
added a TODO that explains why this might not really be desirable, if
we can avoid it (the only way would be to reverse that locking scheme
which would potentially cause the more busy vm_cache locks to be held
longer).
* vm_copy_area() uses the MultiAddressSpaceLocker, but actually forget to
call Lock() on it...
* delete_area() leaks vm_address_space references - but fixing this currently
causes other problems to be investigated; I'll open a bug for that.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21862 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Removed the ref_count from vm_areas. You now always need to have the address
space locked (read or write, depending on what you do) when dealing with
areas.
* Added helper classes for locking the address space: AddressSpace{Read|Write}Locker,
and MultiAddressSpaceLocker which can lock several spaces at once and makes
sure no dead locks can happen.
* resize_area() is now using the MultiAddressSpaceLocker instead of no locking
at all; ie. it should now be safely to use.
* Disabled transfer_area() for now; it will be changed to work like an atomic
clone_area()/delete_area(), that is, it will hand out a new ID for the
transfered area.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21848 a95241bf-73f2-0310-859d-f6bbb57e9c96
that an error can be propagated back to vm_soft_fault().
* Added boolean restart reference parameter to fault_find_page() which
is set to true whenever a condition is it encountered that requires
to start fault_find_page() from the very beginning. fault_get_page()
checks the flag and executes fault_find_page() in a loop, now.
* Removed the panic()s+TODOs in fault_find_page() when a cache became
busy. The restart feature is used in this case.
* fault_find_page(): If after the loop we haven't found a page yet,
and after locking the right cache one turned up, we restart the
function, too, thus avoiding double insertion of a page into a cache.
* Fixed potential dead-lock in fault_get_page(): After inserting a clean
page into a cache other than the top cache (read fault on
copy-on-write area not backed by a file (e.g. the heap)) the dummy
page was removed from the to be locked top cache while we still held a
lock for the lower cache, thus inverting the locking direction
required by the cache locking policy (top -> bottom).
* fault_get_page(): In case of a write access and a readable page found
in a lower cache, vm_cache_remove_consumer() could have replaced our
dummy page with a real page from a collapsed lower cache while we
had unlocked both caches. We didn't check for this condition and
always inserted our freshly allocated page, thus potentially inserting
a duplicate page into the top cache. We do the check now and discard our
page, when another page turned up. Fixes bug #1359.
* fault_get_page(), same if block: Removed unused case for removal of the
dummy page from a non-top cache. We only ever insert it into the top
cache and it should not be moved to another cache. Added an assert.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21841 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Inode::MayReleaseWriter() would release the semaphore too often; therefore,
Inode::WriteDataToBuffer() now loops in case it still couldn't write anything
instead of failing - this fixes a race condition (ie. a device is full message).
* In case the read request got filled two times (while adding the request, and
after waiting for it to become filled), ReadRequest::PutBuffer() overwrote the
output data. This fixes bug #1331.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21830 a95241bf-73f2-0310-859d-f6bbb57e9c96
offset of the page to insert is already in the cache. Revealed the bug
fixed with my previous commit.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21817 a95241bf-73f2-0310-859d-f6bbb57e9c96
from the store into the top cache, which could lead to pages inserted
multiple times into the cache. We don't insert a dummy page in this case
anymore. Instead we mark a freshly allocated page busy and insert that
one. That's exactly the approach the file cache uses too. This does
probably make the whole dummy page special handling in the file cache
obsolete.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21816 a95241bf-73f2-0310-859d-f6bbb57e9c96
to acquire the extra vnode reference, and actually prevented unmounting from
working - which it now does again.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21806 a95241bf-73f2-0310-859d-f6bbb57e9c96
than you own - instead of crashing some time later, it will now panic as
soon as it can.
* No longer put the module image for B_KEEP_LOADED modules - essentially,
that feature was broken.
* Now use the RecursiveLocker in favour of manual locking where appropriate.
This actually fixed two locking bugs in error code paths.
* Applied a patch by François Revol: open_module_list() did not work
when the prefix was already inside a module (as opposed to a directory
on disk). The current solution is not as efficient, but that can be
fixed by improving the iterator code.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21803 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Adjusted the FS initialize() hook to have FD and partition_id
parameters like the other hooks instead of the partition path.
* Adjusted initialization in BFS accordingly.
* Implemented the FS initialization method in KFileSystem.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21788 a95241bf-73f2-0310-859d-f6bbb57e9c96
Certain interrupts don't disable interrupts. We were calling
x86_{push,pop}_iframe() without specifically disabling them, thus causing
a race condition with could cause the iframe stack to be invalid. This
could cause all kinds of problems.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21784 a95241bf-73f2-0310-859d-f6bbb57e9c96
After exec() we re-entered the userland without removing the syscall
iframe from the iframe stack, thus leaking one stack slot.
Fixes bug #1304.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21783 a95241bf-73f2-0310-859d-f6bbb57e9c96
released it last, and the counts involved.
Furthermore, release_sem_etc() will now only negate the acquirer thread
ID instead of setting it to -1.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21781 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Simplified the notification framework: removed the updater stuff completely;
it was only there to account for some peculiarities of the node monitor which
we now solved differently.
* NotificationListener no longer includes a doubly linked list link for convenience;
it might want to listen to more than just one service.
* NotificationService cannot have an abstract destructor.
* Changed the _user_stop_watching() syscall to mirror the Be API; ie. it's no
longer possible to just remove some flags separately, just to stop listening
completely.
* Adapted the node monitor implementation to live in the NodeMonitorService class
that uses the new notification framework.
* Removed the public kernel node monitor API - it wasn't useful that way since you
couldn't do a lot with the KMessage in the kernel without using a private API.
Now you will have to use the (private) notification manager to use the node monitor
from inside the kernel. At a later point, we might introduce a public API for that,
too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21780 a95241bf-73f2-0310-859d-f6bbb57e9c96
Will be used for node monitoring and other stuff, too (like the Registrar or the
VM low memory handler).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21768 a95241bf-73f2-0310-859d-f6bbb57e9c96
therefore, we could remove the ugly defines from KMessage again, and compile it
with KMESSAGE_CONTAINER_ONLY.
* Added KMessage::SetDeliveryInfo() to be able to send messages with a correct
header.
* Fixed a bug in KMessage::SendTo() that would not send the senderTeam when passing
a negative value for the parameter, but override it when passing in a valid
value.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21740 a95241bf-73f2-0310-859d-f6bbb57e9c96
single priority 12 thread can make the whole GUI appear frozen.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21736 a95241bf-73f2-0310-859d-f6bbb57e9c96
It's now possible to debug amok-running user threads by
suspending or resuming them, as well as dropping them into
the userland-debugger from inside kdl.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21734 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Moved method documentation from headers to source files.
* Fixed small problems (memory leaks, unsafe string duplication,...).
* Added TODOs where I spotted problems.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21721 a95241bf-73f2-0310-859d-f6bbb57e9c96
for _kern_load_image().
* Added KMessage to the runtime_loader (a bit hacky, though) - it will use
it to deliver the above mentioned functionality.
* load_dependencies() did return the wrong status code in case a library
was missing; now it returns B_MISSING_LIBRARY.
* load_dependencies() will now try to load all dependencies when a report
message is requested; therefore, all missing libraries are listed.
* Renamed uspace_program_args to user_space_program_args.
* The kernel filled in various members of the user_space_program_args structure
unsafely, ie. was not using user_memcpy().
* Renamed some local variables in team.c to better fit our style guide (ie.
uargs to userArgs).
* Changed Tracker to use the new _kern_load_image() variant on Haiku to retrieve
and report all missing libraries. This fixes bug #1324.
* Adapted kernel_cpp.cpp to the runtime loader as well; the latter will now
compile with _LOADER_MODE defined.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21715 a95241bf-73f2-0310-859d-f6bbb57e9c96
now fail with B_BAD_VALUE. It's also no longer possible to overwrite the begin
of a partition by specifying a negative position, as negative positions are no
longer translated into 0.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21702 a95241bf-73f2-0310-859d-f6bbb57e9c96
* More conditional debug code (wrt page transitions between caches).
* Replaced debugger command cache_chain by a nicer cache_tree.
* While handling a soft fault: When we temporarily unlock a cache, it
can theoretically become busy. One such occurrence is now handled
properly, two more panic() ATM, though should be fixed.
* When merging caches, we do now always replace a dummy page in the
upper cache, not only when the concurrent page fault is a read fault.
This prevents a page from the lower (to be discarded) cache from still
remaining mapped (causing a panic).
* When merging caches and replacing a dummy page, we were trying to
remove the dummy page from the wrong cache (causing a panic).
The Haiku kernel seems now to run shockingly stable. ATM, we have more
than two hours uptime of a system booted and running over network. We
didn't manage to get it down by fully building Pe, downloading, unzipping,
and playing with various stuff. Someone should finally fix all those app
server drawing bugs, though (hint, hint! ;-)).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21672 a95241bf-73f2-0310-859d-f6bbb57e9c96
misrouting when the net server set up the loop device, thus stopping the
net boot process.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21662 a95241bf-73f2-0310-859d-f6bbb57e9c96
Answered Travis question. We save the registers from the exception
causing the double fault in the double fault iframe, since otherwise it
would contain only completely unusable values.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21661 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Refactored RescanDiskSystems(). Pulled out a function
_RescanDiskSystems() that scans for either file or partitioning
systems. RescanDiskSystems(), which scanned for file systems only
before, is used from the constructor as well (open_module_list()
works in the early boot process since a while).
* Made InitialDeviceScan() and partition scanning safe to be called a second
time. We call it directly after the kernel has mounted the boot
volume, now, so that additional disk systems from the boot volume have a
chance to recognize previously unrecognized partitions. This is a
temporary change only; later the disk device manager shall
automatically find out when new disk systems/devices/whatever are
available.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21655 a95241bf-73f2-0310-859d-f6bbb57e9c96
When loading the driver settings the defaults don't override the
previous variable values anymore.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21654 a95241bf-73f2-0310-859d-f6bbb57e9c96
one, not the one intended for the double fault) since r20131. IOW double faults are
now working again.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21645 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Minor cleanup, reordered header files to go from private/local to public/global.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21623 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Images preloaded by the boot loader had to be modules to be of any use
to the kernel. Extended the mechanism so that any images not accepted
by the module code would later be tried to be added as drivers by the
devfs. This is a little hacky ATM, since the devfs manages the drivers
using a hash map keyed by the drivers inode ID, which those drivers
obviously don't have.
* The devfs emulates read_pages() using read(), if the device driver
doesn't implement the former (all old-style drivers), thus making it
possible to BFS, which uses the file cache which in turn requires
read_pages(), on the device. write_pages() emulation is still missing.
* Replaced the kernel_args::boot_disk structure by a KMessage, which can
more flexibly be extended and deals more gracefully with
arbitrarily-size data. The disk_identifier structure still exists,
though. It is added as message field in cases where needed (non net
boot). Moved the boot_drive_number field of the bios_ia32 platform
specific args into the message.
* Made the stage 1 PXE boot loader superfluous. Moved the relevant
initialization code into the stage 2 loader, which can now be loaded
directly via PXE.
* The PXE boot loader does now download a boot tgz archive via TFTP. It
does no longer use the RemoteDisk protocol (it could actually be
removed from the boot loader). It also parses the DHCP options in the
DHCPACK packet provided by PXE and extracts the root path to be
mounted by the kernel.
* Reorganized the boot volume search in the kernel (vfs_boot.cpp) and
added support for network boot. In this case the net stack is
initialized and the network interface the boot loader used is brought
up and configured. Since NBD and RemoteDisk are our only options for
net boot (and those aren't really configurable dynamically) ATM, the
the boot device is found automatically by the disk device manager.
Booting via PXE does work to some degree now. The most grievous problem
is that loading certain drivers or kernel modules (or related activity)
causes a reboot (likely a triple fault, though one wonders where our
double fault handler is on vacation). Namely the keyboard and mouse input
server add-ons need to be deactivated as well as the media server.
A smaller problem is the net server, which apparently tries to
(re-)configure the network interface we're using to boot, which
obviously doesn't work out that well. So, if all this stuff is disabled
Haiku does fully boot, when using the RemoteDisk protocol (not being
able to use keyboard or mouse doesn't make this a particular fascinating
experience, though ;-)). I had no luck with NBD -- it seemed to have
protocol problems with the servers I tried.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21611 a95241bf-73f2-0310-859d-f6bbb57e9c96
with the same size as the class is defined.
* The SetTo() methods do now accept an unspecified (negative) bufferSize
in case of being told to initialize from the given buffer.
* Added handy Get*() methods returning a field element value or a
supplied default value, if the field element doesn't exist.
* Added also handy Set*() methods setting the value of first element of
a field, i.e. adding it, if it didn't exist before, otherwise
replacing the old value. Only for fixed size types.
* Moved _FindType() inline template method into the header.
* Made the source file fit for use in the boot loader. If the macro
KMESSAGE_CONTAINER_ONLY is defined, the message sending/receiving part
is omitted.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21605 a95241bf-73f2-0310-859d-f6bbb57e9c96
removed in several cases.
* vfs_get_vnode_cache() now always gives out a reference to the cache it
returns; if it needs to allocate a new one, the vnode owns one reference,
and the caller another.
* therefore, file_cache_create() now owns a reference to its vm_cache_ref, and
frees it in file_cache_delete().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21533 a95241bf-73f2-0310-859d-f6bbb57e9c96
relevant for the image creation.
* The CopySetHaikuRevision propagates the value of the
HAIKU_INCLUDE_IN_IMAGE variable from the source to the target.
* Propagate the value of HAIKU_INCLUDE_IN_IMAGE from "kernel" to
"kernel_$(TARGET_ARCH)".
Now "jam update-install kernel" should work as expected.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21527 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_copy_on_write_area() now does no longer overwrite the ref_count, but keeps
it's reference to the cache until it has unlocked it.
* It now also locks its reference from the start, preventing any other thread
to interfere.
* vm_cache_remove_consumer() now detects if it has to remove a foreign busy
page itself in order to preserve a mapped page.
* vm_soft_fault() now keeps a reference to the cache that owns the page to be
mapped until it has actually mapped it.
* vm_unmap_pages() removed the mappings of all pages of the area instead of only
those that are within the requested range.
* Kept (disabled) debug output for convenience.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21482 a95241bf-73f2-0310-859d-f6bbb57e9c96
Disabled by default, but all kernel devs are *highly* recommended to turn them on for your builds and see if it trips anything, and then fix it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21477 a95241bf-73f2-0310-859d-f6bbb57e9c96
When iterating through modules, the iterator was loading the module file, inserting it into the module image hash. Then, the first time get_module() was called on a module contained in the image, it was trying to load the image again. It probably actually was. Changed the logic to call get_module_image() which checks to see if it's already loaded.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21476 a95241bf-73f2-0310-859d-f6bbb57e9c96
also works for partial matches (which for example broke "running" and "ready"
when you only entered a part of it).
* Renamed the global args pointer to sArguments.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21324 a95241bf-73f2-0310-859d-f6bbb57e9c96
used during early boot. Thanks!
* Fixed open_module_list() so that it can deal with a NULL prefix.
* Added a note that get_next_loaded_module_name() is implemented incorrectly.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21315 a95241bf-73f2-0310-859d-f6bbb57e9c96
in the vnode hash; that's a bug in the FS that shouldn't be ignored that way.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21262 a95241bf-73f2-0310-859d-f6bbb57e9c96
see bug #1248.
* Closing a pipe now also removes it from the public namespace and marks it for
deletion, and thus, there are no more left-overs after using a pipe.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21261 a95241bf-73f2-0310-859d-f6bbb57e9c96
This should allow you to actually unmount /pipe if you so desire.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21199 a95241bf-73f2-0310-859d-f6bbb57e9c96
libroot). It's available in the kernel through the private
get_haiku_revision() and added to the kernel syslog output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21173 a95241bf-73f2-0310-859d-f6bbb57e9c96
* PowerStatus is now using this API when compiled for Haiku.
* Note, I'm not sure why yet, but running PowerStatus in the background
crashes at least my laptop after some time.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21154 a95241bf-73f2-0310-859d-f6bbb57e9c96
are used at the same time.
* Added a TODO item: pipefs entries aren't deleted yet after usage!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21108 a95241bf-73f2-0310-859d-f6bbb57e9c96
- on CACHE_DURING_BOOT init benaphore count with 1.
- account for allocated space on early_allocate_pages.
- fixed slab position calculation in small slabs.
- we can now init all allocator sizes early rather than later.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20914 a95241bf-73f2-0310-859d-f6bbb57e9c96
Reversed arguments in kernel settings file, now you only need to uncomment a line
to get the non-default setting. Explained default setting in comments.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20907 a95241bf-73f2-0310-859d-f6bbb57e9c96
- call the reclaimer callback when low on memory.
- use the depot when on multi-cpu setups (for scalability).
- fixed the amount of memory spent on slabs for very large objects.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20889 a95241bf-73f2-0310-859d-f6bbb57e9c96
close all of its file descriptors), code outside of the core kernel would be executed
in the descriptor's close/free hooks.
Since the semaphore timeout code, and send_data()/receive_data() rely on the
thread being available in the thread hash, they wouldn't work anymore.
This fixes bug #1168. Thanks to Marcus for providing such a nice test case :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20808 a95241bf-73f2-0310-859d-f6bbb57e9c96
quite a bit in the past already); it somehow doesn't work right with how semaphores
are used in BeOS/Haiku.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20759 a95241bf-73f2-0310-859d-f6bbb57e9c96
threads with higher priorities a much better scheduling experience, it
also creates a problem as soon as more than one higher priority thread
waits on a resource held by a lower priority thread; the higher priority
threads play ping-pong, and the lower priority thread doesn't get it's
chance.
* Increased the probability of skipping a thread priority.
* I won't do any other changes on the scheduler, that's meianote's job now :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20758 a95241bf-73f2-0310-859d-f6bbb57e9c96
The solution is less than optimal, but should work for now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20722 a95241bf-73f2-0310-859d-f6bbb57e9c96
so we can't easily check if the remaining mappings are valid - therefore I disabled
the check completely.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20654 a95241bf-73f2-0310-859d-f6bbb57e9c96
if the page is currently copied, the source page still has mappings.
* vm_copy_on_write_area() did not set the cache type for the upper cache.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20530 a95241bf-73f2-0310-859d-f6bbb57e9c96
* read_dir() is supposed to return B_OK and and a count of 0 when
reaching the end of the directory. In case the node in question could
not be found, we were looping infinitely.
* free_dir_cookie() was not invoked.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20519 a95241bf-73f2-0310-859d-f6bbb57e9c96
small to hold the information for the requested I/O size.
* get_file_map() returned B_BUFFER_OVERFLOW already in case the array
was exactly as large as needed.
* read_chunk_into_cache() and write_chunk_to_cache() will no longer
override their local "size" variable.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20509 a95241bf-73f2-0310-859d-f6bbb57e9c96
sets a fault handler, so that an invalid memory access while executing
the command (address typos always do the trick :-) won't result in
another KDL session on top of the current one, which wouldn't even be
"cont"able.
All pieces of code setting a fault handler do now save and reset the
previous one, so that e.g. a user_memcpy() in a debugger command doesn't
disturb the mechanism.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20500 a95241bf-73f2-0310-859d-f6bbb57e9c96
unload_kernel_add_on(). The former one could lead to deadlocks with
load_kernel_add_on() (e.g. occasionally the boot process would hang).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20485 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added a few comments.
* Simplified the nested while loops by dropping the special handling for the
first iovec and restructuring the innermost loop. This also rules out
the possibility of a zero-length temporary vec. IMHO the readability
has improved quite a bit (YMMV :-). Hopefully without introducing new
bugs; please review!
* Corrected computation of totalSize in case less than size has been
read/written.
* Also set *_numBytes in case all fileVecs have been processed. Only
relevant in case the request extends beyond the end of file.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20483 a95241bf-73f2-0310-859d-f6bbb57e9c96
filling them which could have written over the stack, and their iovec length
was set for the wrong iovec, potentially clobbering any memory.
* The first tempVec was usually empty, anyway, as the wrong iovec was chosen
to start from (usually one too early).
* The tempVec loop is now repeated until the whole fileVec is completed.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20476 a95241bf-73f2-0310-859d-f6bbb57e9c96
in.
* New debugger command "find_page", which searches all page queues to
find out, which one a page is actually in.
* Solved nasty race condition between the page scrubber and
vm_page_allocate_page_run(): The page scrubber didn't mark the pages
it was processing busy, so that vm_page_allocate_page_run() could claim
them in the meantime. They would end up in the clear pages queue,
although being assigned to a cache at the same time. This should
finally solve bug #1056.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20474 a95241bf-73f2-0310-859d-f6bbb57e9c96
being merged in vm_cache_remove_consumer(), fault_find_page() tried again
with the current vm_cache_ref, but didn't realize it might have had inserted
a busy page in this cache already.
This fixes a deadlock, as this page would never get unbusy again.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20470 a95241bf-73f2-0310-859d-f6bbb57e9c96
that returns 0. Patch by Hugo Santos.
* Removed superfluous memset() of select_sync structures.
* Some cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20467 a95241bf-73f2-0310-859d-f6bbb57e9c96
would start with the first block in the unused blocks list, but then
continue with the blocks that share the same hash table slot, thus
freeing potentially used blocks. Could theoretically have caused
BFS to see and write incorrect meta/administrative data on certain
occasions.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20459 a95241bf-73f2-0310-859d-f6bbb57e9c96
yet sure what is causing this, but until I find the time to look into it (or someone else
as part of GSoC), raising the limit helps.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20427 a95241bf-73f2-0310-859d-f6bbb57e9c96
owner of that thread - this fixes the kernel part of bug #1122.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20419 a95241bf-73f2-0310-859d-f6bbb57e9c96
short, if the FD table size wasn't a multiple of 8.
* vfs_resize_fd_table() didn't seem to know at all about the
close-on-exit bitmap. The pointer in the io_context would point to
free()d memory afterwards. This explains the sporadically closed
stdin/out/err descriptors in programs started from Tracker and
Deskbar.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20413 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added a comment to vm_remove_all_page_mappings() that shows that we need to
change the mapping spinlock into a mutex.
* Pointed out some potential problems in the code.
* Added vm_page_at_index(), vm_clear_map_activation(), and vm_test_map_activation()
in preparation of the page scanner rewrite.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20407 a95241bf-73f2-0310-859d-f6bbb57e9c96
mapped fully read-only (for both kernel and userland). Previously a
kernel read access to a yet unmapped r/w accessible userland address
would cause the page from the lower cache to be mapped with write
permission for userland (on x86 also for the kernel) thus e.g.
allowing a fork()ed child process to write to the parent process'
memory.
Fixes bugs #113 and #928.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20402 a95241bf-73f2-0310-859d-f6bbb57e9c96
{set,clear}_debugger_{break,watch}point(), allowing to set/clear break
and watchpoints for the calling team. When a break/watchpoint is hit,
the team enters the debugger. Handy in situations when the program in
question can't really be started in a debugger (or it would be
complicated to do so). The functions work only as long as no debugger is
installed for the team.
We clear the arch specific team and thread debug infos now, when a new
debugger is installed, thus clearing break- and watchpoints.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20396 a95241bf-73f2-0310-859d-f6bbb57e9c96
* NewBlock()/FreeBlock() are now symmetrical in that the former no longer inserts
the block into the hash table.
* delete_transaction() also no longer removes the transaction from the hash table.
* cache_transaction_sync() now uses the new hash_remove_current() function.
* minor other cleanup (like line breaks).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20374 a95241bf-73f2-0310-859d-f6bbb57e9c96
hashtable in case of a read error (NewBlock() also adds the block,
but FreeBlock() only frees it).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20365 a95241bf-73f2-0310-859d-f6bbb57e9c96
suggested by Ingo; before it would just fill the physical pages with NULL pointers.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20364 a95241bf-73f2-0310-859d-f6bbb57e9c96
start address wasn't aligned and numBytes was a multiple of the page
size, the last page was ignored. A subsequent get_memory_map() would
return NULL as physical address for that page, if it hadn't been mapped
before (that function looks generally suspicious, IMHO). E.g. reads from a
device into an unaligned buffer that hadn't been touched before would
hit that problem. Fixes bug #1075. Might also fix other reported
problems (like #1056), since this bug could have cause all kinds of weird
behavior and crashes.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20362 a95241bf-73f2-0310-859d-f6bbb57e9c96
that points to both, the page and the area the page is in. This will allow a page
scanner to steal unused pages when necessary.
* The locking is currently done with a spinlock which we might want to have another
look at one day.
* dump_page() and dump_area_struct() now dump the page mappings as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20356 a95241bf-73f2-0310-859d-f6bbb57e9c96
add-ons accordingly and removed the syscall.
* Removed send_notification().
* Reimplemented notify_listener(). It used the unimplemented
send_notification(). Now it has a chance to work. Note that
notify_listener() is obsolete. I would already have removed it, if
there weren't lots of FS implementations still using it (Hint!).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20329 a95241bf-73f2-0310-859d-f6bbb57e9c96
vnode::covered_by fields. Together with sMountOpLock it allows write
access, either lock alone suffices for read access. Before
sMountOpLock had to be acquired for read (and write) access, which
meant that while mounting/unmounting a FS path resolution would have
to wait. In case of the UserlandFS this would even cause a deadlock
while mounting if the client tried to resolve the path of the device
to be mounted (e.g. by opening it).
* Added a clarifying comment about read access to the
fs_mount::covers_vnode/root_vnode field and removed locking in
resolve_volume_root_to_mount_point() which was not necessary for
explained reasons.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20308 a95241bf-73f2-0310-859d-f6bbb57e9c96
name (saves copying the name, if that has to be done anyway) and added a
wrapper version with the old interface.
* dir_vnode_to_path() was broken for file systems that didn't support
the get_vnode_name() hook. It resolved the mount point too early, so
that it was searching the mount point and not the FS root dir for the
node. It uses the get_vnode_name() function now (before resolving the
mount point).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20305 a95241bf-73f2-0310-859d-f6bbb57e9c96
to B_FULL_LOCK.
* vm_clone_area() now respects the source area's wiring and inherits it. This
should fix bug #1055.
* vm_cache::type is now duplicated in vm_area::cache_type - this allows looking
it up without having to lock a vm_cache_ref; this also solves a locking bug
in vm_unmap_pages() in this regard.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20281 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Made the output look a bit more like that of the other commands.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20279 a95241bf-73f2-0310-859d-f6bbb57e9c96
Basically, there was a pretty subtle race between the cpus in main where if the main cpu released the AP cpus and then before the AP cpus had a chance to run the boot cpu started creating the main thread (which causes smp ici messages to be created) the system would livelock, where the boot cpu waited forever for the AP cpu to acknowledge the ICI (for a TLB flush when creating the kernel stack).
Added smp_cpu_rendezvous(), used to synchronize all the cpus to a particular point, and used it a few times in main().
While i was at it i fixed another race that'll probably never happen, but what the hey. Make sure the kernel args are copied into kernel space by the main cpu before letting any other ones use it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20269 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_area and vm_page now have a new field "mappings" where they will store lists
of vm_page_mapping structures. vm_page::ref_count is gone, as it's no longer
needed (it was never updated correctly, anyway).
* vm_caches now have a type field, ie. CACHE_TYPE_RAM for anonymous areas - this
makes the stores a bit less independent, but is quite handy in several places.
* Added new vm_map_page() and vm_unmap_pages() functions to be used whenever you
map in or unmap pages into/from an area. They don't do much more than handling
vm_page::wired_count correctly right now, though (ie. B_LAZY_LOCK is now working
as expected as well).
* Moved the device fault handler to vm_map_physical_memory(); it was not really
used as a fault handler, anyway.
* Didn't notice Ingo's changes to the I/O space region broke lock_memory(). It
now checks the type of the area that contains the memory, and doesn't lock
anymore if not needed which solves the problem in a platform independent way.
* Implemented lock_memory() and unlock_memory() for real: they now change the
vm_page::wired_count member to identify pages that shouldn't be paged out.
* vm_area_for() now uses vm_area_lookup() internally.
* Fixed various potential overflow conditions with areas that reach 0xffffffff.
* Creating anonymous areas with B_FULL_LOCK no longer causes vm_soft_fault()
to be called, instead, the pages are allocated and mapped (via vm_map_page())
directly.
* Removed the _vm_ prefix for create_area_struct() and create_reserved_area_struct().
* Fixed a bug in vm_page_write_modified() that would not have enqueued pages that
failed to be written to the modified queue again when needed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20251 a95241bf-73f2-0310-859d-f6bbb57e9c96
opening bracket) - thanks!
* Shuffled functions a bit around to separate static and exported functions.
* Some other cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20245 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Renamed them, made everything static besides vm_allocate_early() (previous
vm_alloc_from_kernel_args()) which now allows you to specify a different
virtual than physical size, and therefore makes vm_alloc_virtual_from_kernel_args()
superfluous (which isn't exported anymore, and is now called allocate_early_virtual()).
* Enabled printing a stack trace on serial output on team crash - it doesn't hurt
for now, anyway.
* Cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20244 a95241bf-73f2-0310-859d-f6bbb57e9c96
The kernel arg logic was faulty, and wasn't using strlcpy properly (which returns the size of the src string, not the remaining size). Replaced it with a simpler, but less efficient series of strlcat()s.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20162 a95241bf-73f2-0310-859d-f6bbb57e9c96
The first use is to let the kernel decide what the preferred syscall mechanism is at boot time and copy the
appropriate user space code there. Can be used for routines the kernel can decide best how to use (memcpy, some
timing routines, etc).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20161 a95241bf-73f2-0310-859d-f6bbb57e9c96
the new cpuid stuff was apparently exacerbating an existing problem where various bits of low level
cpu code (specifically get_current_cpu) weren't really initialized before being used. Changed the
order to set up a fake set of threads to point each cpu at really early in boot to make sure that at
all points in code it can get the current 'thread' and thus the current cpu.
A probably better solution would be to have dr3 point to the current cpu which would then point to the
current thread, but that has a race condition that would require an int disable, etc.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20160 a95241bf-73f2-0310-859d-f6bbb57e9c96
away cpuid info into the current cpu structure. Trouble was the code was running before the current
thread pointer was set on each cpu, so it was always looking up cpu 0's structure and saving there,
leaving the other ones uninitialized. Surprisingly this works fine on my machine, but obviously fails
on others (cpuid info would have been zeroed probably). Solution is to change the order that things
are brought up on each cpu to set the current thread pointer first. I don't really like that solution
but it'll work for now. Added a comment to the effect.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20154 a95241bf-73f2-0310-859d-f6bbb57e9c96
Now two complete tss structures exist within the per-cpu structure. Instead
of having to create a seperate area per each one, initialize them in place.
Also, the old mechanism to getting all of the cpus to get initialized was
subtly broken, but still managed to work. Now, just force all the cpus to
initialize at boot, which makes the actual swapping of esp0 somewhat simpler.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20131 a95241bf-73f2-0310-859d-f6bbb57e9c96
* recursive_lock_unlock() now returns a void to mirror it's counterpart better;
use recursive_lock_get_recursion() if you're interested in the lock depth.
* switch_sem(), and release_sem() now don't do anything anymore in kernel startup
mode.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20099 a95241bf-73f2-0310-859d-f6bbb57e9c96
for one quantum wasn't really a good idea, as this could get quite expensive for the thread
(depending on the system load, it might have taken a long time until the thread was scheduled
again, no matter what priority it was).
Also, calling thread_yield() in a loop would have taken 100% CPU time.
Now, we sort the thread into the queue as with any other thread, but we'll ignore it once.
This now guarantees an actual context switch, as well as a much fairer rescheduling policy
for threads calling that function.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20077 a95241bf-73f2-0310-859d-f6bbb57e9c96
at boot, per cpu, detect the cpu, pull down all the relevant cpuid bits and
save them into the per-cpu structure. Changed most of the code scattered here
and there that reads the cpuid to use a new api, x86_check_feature, which looks
at the saved bits.
Also changed the system_info stuff to read from these bits.
While i was at it, refreshed all the bits to be current.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20072 a95241bf-73f2-0310-859d-f6bbb57e9c96
Replaced the _kern_null syscall with _kern_is_computer_on.
is_computer_on_fire is a bit harder, since it returns a float from kernelland, which
at the moment isn't supported in haiku.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20069 a95241bf-73f2-0310-859d-f6bbb57e9c96
I don't know why (or how) it could work before r19775, though.
This fixes the wrong return code from wait_for_thread() in most cases, and thus,
bug #1011.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20060 a95241bf-73f2-0310-859d-f6bbb57e9c96
* we now always flush the TLBs after having unmapped some pages.
* vm_soft_fault() could traverse to a source cache while it was being collapsed
by vm_cache_remove_consumer() - this is now no longer possible as the latter
marks the cache as busy when doing so, and the former now tests this flag and
locks the cache (via the new fault_acquire_locked_source() function).
* if fault_acquire_locked_source() fails with B_BUSY, the current cache is locked
again, and tested again for the page - as it might have been moved upwards to it
with the destruction of its former source.
* The cache delivering the page for vm_soft_fault() is now locked until the end;
it can no longer go away before having actually mapped the page into the area.
* This also fixes the issue where pages would get lost as vm_soft_fault() put the
page in the active list, no matter if its cache still existed.
* Also, we now keep a reference of to a cache in case a dummy page is inserted; this
makes again sure that it doesn't go away during the execution of vm_soft_fault()
(which could even add this page to the free list...).
* divided vm_soft_fault() into several smaller functions which should make it much
more readable.
* Added a "cache_chain" KDL command that dumps the whole chain until the bottom
when giving a pointer to a vm_cache as parameter.
* now usually call vm_cache_acquire_ref() before map_backing_store(), even though
it shouldn't be really needed (I added it for debugging purposes).
* Some minor cleanup.
* NOTE: a major problem still persists: when removing a vm_cache, it's possible
that some of its pages are still mapped, and there is currently no mechanism
to get rid of these mappings! I've added TODO comments into vm_cache.c where
appropriate.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20028 a95241bf-73f2-0310-859d-f6bbb57e9c96
The "lookup" option has been removed, there is now a "-p" for a physical address, and
"-v" for a virtual address.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20016 a95241bf-73f2-0310-859d-f6bbb57e9c96
process group. This fixes bug #996.
* As a result, the process group stuff and wait_for_child() got much simpler;
get_death_entry() and update_wait_for_any() could go away completely.
* If a team goes away, all of its children are now "reparented" to the kernel team,
instead of the team's parent - this follows common implementations (and POSIX if
I understand it correctly), but not BeOS anymore. The OpenGroup Base says this
about this topic: "If a parent process terminates without waiting for all of its
child processes to terminate, the remaining child processes shall be assigned a
new parent process ID corresponding to an implementation-defined system process."
* We wait too long in wait_test_4 which at least puts us on par with Linux; see
comment in _user_setpgid().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20010 a95241bf-73f2-0310-859d-f6bbb57e9c96
ECHILD in case it doesn't. This fixes bug #995.
* Added a TODO item for solving bug #996.
* wait_for_child() did not release the team lock and restore interrupts in case
the child you wanted to wait for didn't exist...
* with child > 0, wait_for_child() will now check if its really a child of yours,
and not just in the same process group.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19993 a95241bf-73f2-0310-859d-f6bbb57e9c96
This fixes a possible crashing bug when an application with disconnected descriptors
quits.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19951 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Also, the output no longer has the leading "0x" to ease reading.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19906 a95241bf-73f2-0310-859d-f6bbb57e9c96
this fixes bug #227 again (which I recently opened again accidently).
* We actually switched the last consumer's source without having acquired its
lock! This fixes some rare random app crashes as well as potential kernel
crash ("cache to be deleted still has consumers").
* Some more comments to explain why things are done and can be done the way they
are done :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19878 a95241bf-73f2-0310-859d-f6bbb57e9c96
its death entry into the parent team's queue - we need to do this atomically.
As an effect, wait_for_thread() sometimes failed with B_BAD_THREAD_ID.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19808 a95241bf-73f2-0310-859d-f6bbb57e9c96
so that this can be done safely.
It was also needed, as it would call vm_cache_release_ref() on failure which requires you
to have no vm_cache_ref locks around (as it might deadlock in this case).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19806 a95241bf-73f2-0310-859d-f6bbb57e9c96
had the cache_ref locked, it also locked two refs in the wrong order (bottom-up);
there was even a TODO item for this...
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19801 a95241bf-73f2-0310-859d-f6bbb57e9c96
* "sc"/"where"/"bt" now prints the area where the function of the stack frame
is located in case there is no other information (using the above function).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19800 a95241bf-73f2-0310-859d-f6bbb57e9c96
* even worse, in case of fork(), it was never initialized.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19799 a95241bf-73f2-0310-859d-f6bbb57e9c96
two cache_refs - it needs to count the consumers of the lower cache to find
its actual number of references; the upper cache could still be in use by
someone else.
* There were several locking bugs in the VM code; since cache_ref::cache can
change, we must not access it without having the cache_ref locked.
* As a result, map_backing_store() now requires you to have the lock of the
store's cache_ref held.
* And therefore, some functions in vm_cache.c must no longer lock the cache_ref
on their own, but require the caller to have it locked already.
* Added the -s option to the cache/cache_ref KDL commands: it will only print
the requested structure, and not its counterpart (useful if accessing one
structure results in a page fault, as was possible previously).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19796 a95241bf-73f2-0310-859d-f6bbb57e9c96
waiting for in case it was interrupted; but that could easily lead the thread_exit()
function to access invalid memory (and thus, crash the kernel): since we could not
remove our death entry from the thread, we have to make sure the thread (which might
still run even if not in the thread hash anymore) will access our death entry as
long as it is valid. IOW we must wait for the thread to delete its exit semaphore,
even if we were interrupted before.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19790 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed dumping the area list of a cache I broke with the previous commit.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19789 a95241bf-73f2-0310-859d-f6bbb57e9c96
(you can still use both commands, but you'll see always the same output).
* The cache_ref's area list now also prints the owner of the area.
* Added "-p" option to "cache"/"cache_ref" that will show the pages of the cache; if you
omit it, it will now only present you a page counter.
* Nicer output for the commands above.
* Added "dl" to display memory in 64 bit values.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19787 a95241bf-73f2-0310-859d-f6bbb57e9c96
* send_signal_etc() (among others) used team::main_thread in an unsafe way; it is
possible for a team to be part of the team list and a group without having
a main thread very early in its creation process.
* Replaced most occurences of team->main_thread->id with team->id since the team
always inherits the ID of its main thread in Haiku for quite some time now.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19781 a95241bf-73f2-0310-859d-f6bbb57e9c96
the userland stack in an unsafe way - moved that stuff to arch_thread_enter_userspace(), too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19778 a95241bf-73f2-0310-859d-f6bbb57e9c96
* This is now used for userland stack - they now always pre-commit two pages, enough
to initialize TLS and copy the user-thread-exit stub to that area.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19776 a95241bf-73f2-0310-859d-f6bbb57e9c96
turned off - accessing userland memory. Now, arch_thread_enter_userspace() does that
job, and as a result, may also fail.
* dump_thread() now directly prints the info of the current thread when used without
argument (rather than iterating the thread list to look for the current thread).
* If arch_thread_init_tls() fails upon thread creation, the function will now return
an error.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19775 a95241bf-73f2-0310-859d-f6bbb57e9c96
them to commit substantially less memory (we we're committing about 40 MB (!) too much
after a complete system boot). This means you'll run out of memory less likely now.
* fill_area_info() no longer filters out kernel protection flags - we may want to keep
filtering them when called from userland, though, dunno.
* Added new debugger command "avail" which shows how much memory has been committed, and
how much is regarded as free space.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19771 a95241bf-73f2-0310-859d-f6bbb57e9c96
to other kernel components.
* wait_for_thread_etc() will now search the team's death entries in case the
thread is already gone; also resume_thread() is now done later, and its return
code will no longer matter (as we already have our death entry, no matter if
the thread is gone now or not).
* The fibo_load_image test now works as expected (only tested with low numbers
yet, though - the mean testing comes later (first comes functionality) :-))
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19758 a95241bf-73f2-0310-859d-f6bbb57e9c96
with a lower priority than the current one.
* Further reduced the probability to skip a thread to roughly 4%, that makes around
13 skips per second, and about 40 msecs spend in lower priority threads per second
(with a 3 msec quantum). Might still be too much, but we'll see.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19719 a95241bf-73f2-0310-859d-f6bbb57e9c96
not a penalty to be the first thread in the run queue...
I've reduced it to about 12.5%, but that might still be too much.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19710 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Now using the new %f flag to print the level of support.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19584 a95241bf-73f2-0310-859d-f6bbb57e9c96
a very simplistic floating point output routine to snprintf() and friends, for
your convenience.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19583 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_soft_fault() did not take into account that a cache's source can change while
traversing a cache chain.
* Now, we grab a reference to every cache we get before locking it, and
* no longer get the cache's source without having the cache locked.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19571 a95241bf-73f2-0310-859d-f6bbb57e9c96
for an extra check in vm_cache_release_ref() as the cache shouldn't have any areas
or consumers at this point.
* Fixed a locking problem in vm_cache_remove_consumer(): the cache was acquired after
its lock was gone, so someone else might have released in the mean time.
* if the cache's source is to be replaced, we now no longer release its lock after
having merged it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19570 a95241bf-73f2-0310-859d-f6bbb57e9c96
* the member will now also be shown when dumping a team.
* minor cleanup: moved fill_team_info() into the private functions part of the file.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19551 a95241bf-73f2-0310-859d-f6bbb57e9c96
-Turns out the area removal routine had a massive race condition inside
vm_put_area(). Basically the area was removed from the address space's
area list before the pages were unmapped, so the vm could (and would)
recycle the space before the pages were finally unmapped.
It was completely reproducable on my machine during initialization of a bunch
of storage drivers that were bringing the locked_pool module into and out of
existence, which caused a thread to be spawned and stopped in rapid sucession.
On a dual processor machine, it was possible for the new thread to be started
up while the old one was still shutting down, and the kernel stack of the new
one would get wiped out.
Note, there still is a page ref counting problem with this area removal code.
It doesn't decrement the ref count of the page as it unmaps it. Will have to
figure that out.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19549 a95241bf-73f2-0310-859d-f6bbb57e9c96
put a spinlock around the serial debug routines to keep multiple
cpus from interleaving their output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19548 a95241bf-73f2-0310-859d-f6bbb57e9c96
commented the insertion of the attribute name in patterns in the case of a string attribute
notify_probe_by_file chooses a module based on a bus specific suffix
dm_register_child_device has a parameter to optionally check the support for the node
added scanning of bus devices after the boot filesystem is mounted
fixed dm_rescan, locking was misbehaving
fixed SYSTEM_DRIVER_REGISTRATION definition
added B_DRIVER_MAPPING attributes for PCI and ACPI devices:
%vendor%_%device% for PCI, hid_%hid% and type_%type% for ACPI
moved acpi_device_module_info definition to public ACPI.h
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19394 a95241bf-73f2-0310-859d-f6bbb57e9c96
added a user friendly mode for listdev: it works for PCI
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19262 a95241bf-73f2-0310-859d-f6bbb57e9c96
* added a generic syscall for device_manager
it enables to iterate the device manager tree from userland
* the listdev tool is now using it: it's still incomplete as it only dumps nodes and attributes
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19260 a95241bf-73f2-0310-859d-f6bbb57e9c96
This fixes bug #227 by closing that memory and semaphore leak.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19041 a95241bf-73f2-0310-859d-f6bbb57e9c96
address space of reserved areas - IOW address spaces were never freed upon
team exit.
* dump_cache() now prints a list of the cache's consumers.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19040 a95241bf-73f2-0310-859d-f6bbb57e9c96
* a vm_cache now maintains a list of its "consumer" caches.
* introduced to new functions that add/remove consumer to a cache (instead
of only maintaining the vm_cache::source field).
* fixed the incorrect reference counting when doing copy-on-write; we kept
one ref too many of the lower cache.
* minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19035 a95241bf-73f2-0310-859d-f6bbb57e9c96
This also fixes the issue of exporting a C++ API from the kernel.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18974 a95241bf-73f2-0310-859d-f6bbb57e9c96
of a team to avoid confusion. It now also accepts a NULL session pointer in
which case the actual group's session doesn't matter.
* Fixed the race condition in send_signal_etc() that could allow accessing an
invalid team pointer.
* Jerome's earlier change already fixed bug #841, and this also fixed bug #855.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18941 a95241bf-73f2-0310-859d-f6bbb57e9c96
move a 16 bit segment register into 32 bit memory location, and movzx (called movzwl within gcc) doesn't work with
segement registers.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18864 a95241bf-73f2-0310-859d-f6bbb57e9c96
the next step would be to rescan the partition tree with a job to recognize unrecognized partitions (asynchronously ?)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18737 a95241bf-73f2-0310-859d-f6bbb57e9c96
parameter during construction).
* Doing so will now result in a kernel panic whenever your file system tries to
write to a block.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18719 a95241bf-73f2-0310-859d-f6bbb57e9c96
will now grab a reference to the vnode as well if successful. This way, vfs_get_vnode_cache()
now actually works how it should: it will now always grab a reference to the cache and
its underlying vnode. This removes an extra reference to the vnode (and vm_cache) that
got ignored before and prevented volumes to be unmounted (or file caches to be removed).
Thanks to Korli for pointing this out.
* file_cache_create() is now aware of that extra vnode reference and releases it; unmounting
volumes is now working again as it should.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18716 a95241bf-73f2-0310-859d-f6bbb57e9c96
of waiting threads by ID (instead of just the queue head and tail pointers).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18688 a95241bf-73f2-0310-859d-f6bbb57e9c96
(that was part of the problem of bug #702).
* Fixed send_signal_etc() when you called it with a pid_t of zero: the signals should
go to all teams in the calling team's group, not only to the team (for -1, we do
the same for now).
* Made team_get_process_group_locked() public, and rewrote send_signal_etc() to use
it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18684 a95241bf-73f2-0310-859d-f6bbb57e9c96
some signals could go to some group when a negative value was passed in.
This actually fixes bug #702 where SoundPlay obviously does a kill_thread(-1)
at the end (which accidently killed all userspace applications, including the
input_server, app_server, ...).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18683 a95241bf-73f2-0310-859d-f6bbb57e9c96
hash. This also allows them to stay valid after the group leader died when there are
other teams left in it. This closes bug #1.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18622 a95241bf-73f2-0310-859d-f6bbb57e9c96
alarm, or 0 if there isn't any.
* setitimer() now also sets the previous timer values correctly, so that
alarm() and ualarm() now return the correct values as well - this fixes
the test fork_9-1 failing at alarm().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18545 a95241bf-73f2-0310-859d-f6bbb57e9c96
a waitpid() can no longer succeed; this fixes the occasional fork 3-1 test failures.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18544 a95241bf-73f2-0310-859d-f6bbb57e9c96
it waited for a specific child), as B_RELEASE_ALL opened up a race condition between
looking for an existing death entry, and waiting for the dead children semaphore.
Now we're counting all waiting threads for teams and groups separately.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18543 a95241bf-73f2-0310-859d-f6bbb57e9c96
wait_for_child() hanging less probable - there is a general problem with
this code, though, as we need to have a dedicated free counter for the
semaphore to remove all race conditions.
* Also, test fork_3-1 still sometimes fails because the thread is still
available to the public for a short time, even after its death entry
has been collected.
* Added a TODO in the code for these issues.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18529 a95241bf-73f2-0310-859d-f6bbb57e9c96
wanted to wait for a specific child; it always assumed you had specified WNOHANG.
This fixes the bug the fork_3-1 and fork_4-1 test applications reported. 3-1 still
sometimes fails, but that's a different problem (to be solved later).
* Also, it could return B_BAD_THREAD_ID instead of the expected ECHILD (for waitpid()).
* There was a race condition between testing for a thread, and checking its death
entry.
* wait_for_child() can now be interrupted in case it has to wait.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18528 a95241bf-73f2-0310-859d-f6bbb57e9c96
Fixed the build of most of targets using these rules. Though the build can be still broken, feel free to fix.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18521 a95241bf-73f2-0310-859d-f6bbb57e9c96
buffer to allow safe access of the user provided string - maybe we should
introduce a user_strdup() instead.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17960 a95241bf-73f2-0310-859d-f6bbb57e9c96
files, too.
* Added a temporary icon for the kernel until Stephan comes up with a better
one (hint hint!) :-))
* This even fixes bug #648.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17825 a95241bf-73f2-0310-859d-f6bbb57e9c96
arch dependent code (they will be removed as soon as someone else
asks for these interrupt lines).
* Added an interrupt driven keyboard handler to the kernel that uses
this technique. As a result, you can now press F12 to enter the kernel
debugger before the input_server has been started, and Control-Alt-Delete
should reboot the system (actually I did not test the latter yet).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17806 a95241bf-73f2-0310-859d-f6bbb57e9c96
vfs_get_vnode_cache() which did not acquire an extra reference to the
cache_ref when the cache had to be created.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17693 a95241bf-73f2-0310-859d-f6bbb57e9c96
mapping, but it connected the vm_cache objects, so if it failed later, and
thus called vm_cache_release_ref() the object could have been freed accidently.
Most uses of map_backing_store() explicetly acquired a cache_ref *after* the
call was successful, but _vm_map_file() did not do this.
_vm_map_file() might still not work correctly, though, need to have a closer
look at it.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17692 a95241bf-73f2-0310-859d-f6bbb57e9c96
- add loading of kernel debugger/ modules
- add a kgets() exported func for use by nasty modules =)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17657 a95241bf-73f2-0310-859d-f6bbb57e9c96
let them eat death stack entries: after setting the next thread state to
THREAD_STATE_FREE_ON_RESCHED, interrupts were enabled again, which could
cause the thread to be rescheduled before having called put_death_stack().
This fixes bug #434.
* Note that the above change pretty much reverts revision 7865 that was supposed
to fix interrupt problem on thread exit (patch by Jack Burton almost 2 years
ago, that's how long this problem existed!).
* Made get_death_stack() and put_death_stack() symmetrical in that they don't
change interrupts. Also pulled out rescheduling from put_death_stack[_and_reschedule]()
and put it back into thread_exit2().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17652 a95241bf-73f2-0310-859d-f6bbb57e9c96
running team to be able to fill in the team_info::args field. Currently, only
the path is stored, there, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17646 a95241bf-73f2-0310-859d-f6bbb57e9c96
#603.
* Moved devfs_get_partition_info() into the devfs_ioctl() hook.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17622 a95241bf-73f2-0310-859d-f6bbb57e9c96
no longer try to access any MSRs when there are no MTRRs. Got it? :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17574 a95241bf-73f2-0310-859d-f6bbb57e9c96
into more than MAX_FILE_IO_VECS pieces. This could have very weird consequences
like overwriting data outside the file (but on that same partition only).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17536 a95241bf-73f2-0310-859d-f6bbb57e9c96
reading the file map of certain files (hope I got that more or less
right)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17525 a95241bf-73f2-0310-859d-f6bbb57e9c96
* As suggested by Korli, the signal is now encoded in the "reason" field of
wait_for_child().
* waitpid() now sets the status passed in so that the signal can be read out
(but it still doesn't do it's full job).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17338 a95241bf-73f2-0310-859d-f6bbb57e9c96
of the one supplied to fs_mount() (but not the /dev/disk/virtual/... entry, as that
wouldn't be that clear to the user).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17335 a95241bf-73f2-0310-859d-f6bbb57e9c96
scan job in the calling thread).
* KDiskDeviceManager::InitialDeviceScan() now runs synchronously, so that
get_boot_partitions() doesn't need to do this ugly wait hack.
* KDiskDeviceManager::CreateFileDevice() can now run synchronously as well, which
fixes a deadlock in fs_mount() - note, mounting file devices still doesn't work,
though as Haiku's BFS doesn't allow this right now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17334 a95241bf-73f2-0310-859d-f6bbb57e9c96
* _ReadLock() will now fail with B_NO_MEMORY in case the ReadLockInfo couldn't
be created.
* Note, due to a design bug, we cannot guarantee that a previous read lock
can be reestablished after releasing a write lock in case of low memory.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17332 a95241bf-73f2-0310-859d-f6bbb57e9c96
when called with interrupts turned off, get_memory_map() will now call the new
vm_translation_map_ops::query_interrupt() call.
Under PPC, this is trivial (at least right now), but on x86 we need to make sure
we have access to the page table entry, ie. we need to create an area that points
to its own page table entry, so that we can map in the page table entry containing
the address we're looking for. It's not really nice, feel free to come up with
a cleaner solution :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17280 a95241bf-73f2-0310-859d-f6bbb57e9c96
always call all handlers in this case, but we still try to return the correct
return code (ie. B_HANDLED_INTERRUPT and B_INVOKE_SCHEDULER).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17278 a95241bf-73f2-0310-859d-f6bbb57e9c96
the interrupt handlers, not before (like we do for edge triggered ones).
This should prevent hardware from issuing a second interrupt when the software driver
is still busy handling the first.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17276 a95241bf-73f2-0310-859d-f6bbb57e9c96
work correctly when on power supply (ie. when running at full speed). Turns out we
misdetected a spurious interrupt on line 15 - we now ignore them completely which
seems to fix that problem.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17275 a95241bf-73f2-0310-859d-f6bbb57e9c96
no longer needs to lock address space hash table - that also makes the lookup much
faster, too (and a direct pointer is used instead of a hash lookup).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17246 a95241bf-73f2-0310-859d-f6bbb57e9c96
dir_remove() did not normalize the path, and thus, could forward a "." as
name for the removed directory - which BFS didn't catch because it assumed
our VFS would work correctly...
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17165 a95241bf-73f2-0310-859d-f6bbb57e9c96
vnode is not becoming unbusy (right now it even panics, but that can be removed
later on).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17161 a95241bf-73f2-0310-859d-f6bbb57e9c96
as stated in the BeBook - this fixes bug #458 as Tracker directly compared
with that error code.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17144 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vfs_get_fs_node_from_path() now also work for absolute paths again (but
still for relative ones from the volume root) - it just tests if the
mount IDs fit, so it only returns successful if the path really is on
the desired mount.
* the Disk Device Manager publish functions now call devfs_publish_*()
correctly (by omitting the "/dev/" mount point).
* devfs_publish_partition() now accepts absolute device paths but relative
partition paths.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17138 a95241bf-73f2-0310-859d-f6bbb57e9c96
(ie. it only worked for absolute paths, but it shouldn't work for those at
all).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17127 a95241bf-73f2-0310-859d-f6bbb57e9c96
systems a chance to know if they have locked already.
This fixes a locking problem in BFS where one thread tried to acquire two read
locks (where someone else trying to acquire a write lock would have caused a
dead lock).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17108 a95241bf-73f2-0310-859d-f6bbb57e9c96
since it unlocked the cache while waiting on a busy page. Now, we're filling
the pending request before unlocking the cache.
* Fixed the deadlock I mentioned in the last commit: if a page fault happens
at the same time we're trying to read/write from/to a page, we no longer
fight for the BFS inode lock, but eventually doing the job twice if needed.
Will need to go over the "write modified" functions to make sure they are
behaving as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17091 a95241bf-73f2-0310-859d-f6bbb57e9c96
changes made to a file instead of directly using vm_cache_write_modified() -
besides making the file system more independent from the file cache, this also
works around a possible dead lock (that is to be fixed in a later commit).
* fs_sync() no longer uses vnodes from the mount's vnode list directly to write
back the changes made to them, but gets them via ID instead - this makes sure
the vnode is in a valid state and fixes a race condition with free_vnode().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17059 a95241bf-73f2-0310-859d-f6bbb57e9c96
Right now, the size of the device is ignored in the second pass. Maybe this helps
with bug #357.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16917 a95241bf-73f2-0310-859d-f6bbb57e9c96
function, and added a vfs_disconnect_vnode() for other kernel components.
* devfs_unpublish_device() can now optionally make use of this call.
* Fixed the type check of devfs' unpublish_node().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16907 a95241bf-73f2-0310-859d-f6bbb57e9c96
though it looks so simple, I see no reason why it shouldn't work 8-)).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16906 a95241bf-73f2-0310-859d-f6bbb57e9c96
boot volume. The other (better) methods are now disabled in the boot loader.
This fixes bug #241.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16895 a95241bf-73f2-0310-859d-f6bbb57e9c96
tree only, anyway, as it was dumped before the recognition of any devices).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16893 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Adapt other sources where needed (the boot loader's RootFileSystem still
used the old implementation).
* Implemented RootFileSystem::Rewind().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16889 a95241bf-73f2-0310-859d-f6bbb57e9c96
loader): it now supports holes between segments, and accepts any segment order.
* Renamed elf.c to elf.cpp and fixed warnings.
* Renamed elf_image_info::dynamic_ptr and eheader to dynamic_section and elf_header.
* Some cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16878 a95241bf-73f2-0310-859d-f6bbb57e9c96
now on the amount of memory installed in the system. Ie. if you have only
128 MB the kernel heap will be only half in size.
* Minor cleanup in vm_page.c, renamed some variables to match our style guide.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16838 a95241bf-73f2-0310-859d-f6bbb57e9c96
now reflects the number of pages in the areas cache, instead of just the size of the
area.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16834 a95241bf-73f2-0310-859d-f6bbb57e9c96
for the kernel as well, and thus we need to export _kern_get_timezone(),
too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16792 a95241bf-73f2-0310-859d-f6bbb57e9c96
to be killed. Reverted ShutdownProcess.cpp to continue to use kill_team()
instead of sending a signal.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16780 a95241bf-73f2-0310-859d-f6bbb57e9c96
no on-disk modules could be found... (since revision 16584).
* iterator_get_next_module() now makes use of the KPath features, and doesn't
build the new path manually anymore.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16745 a95241bf-73f2-0310-859d-f6bbb57e9c96
the thread priority is now increased by one, we'll see how that turns
out for real (I'm not even convinced that this feature is a good idea
at all yet).
* Enabled debugging the last semaphore acquirer by default.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16744 a95241bf-73f2-0310-859d-f6bbb57e9c96
the root vnode was tried to be removed as well (which resulted in a crash).
Since playing with the root node reference count is a bad idea anyway and opens
a big race condition (with regards to the unused list), we no longer do that
now, until it's safe.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16665 a95241bf-73f2-0310-859d-f6bbb57e9c96
blocks - this is not enough, though as it would also need to ask other
volumes to free ranges.
* Increased the number of blocks to free in case of low memory.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16663 a95241bf-73f2-0310-859d-f6bbb57e9c96
* fs_unmount() freed vnodes, but didn't remove them from the unused list if
needed.
* vfs_get_module_path() could put a vnode twice under several situations.
* vnode_path_to_vnode() now always puts the dir vnode, even if the provided
path is NULL. Documented the fact that it does eat the ref, too.
* Added a to-do item in vfs_get_vnode_cache() about a possible problem.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16662 a95241bf-73f2-0310-859d-f6bbb57e9c96
read_port() or port_buffer_size() will fail immediately.
* Made the functions above plus port_count() support this new way of closing
a port.
* All of Marcus's port tests now succeed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16655 a95241bf-73f2-0310-859d-f6bbb57e9c96
and a timeout.
* _user_wait_for_thread() was not interruptible before, ie. Control-C wouldn't
work.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16654 a95241bf-73f2-0310-859d-f6bbb57e9c96
vfs_free_unused_vnodes()); the vnode mutex is now hold for much shorter times
only:
* Rewrote advisory_locking creation/maintenance to hold the vnode mutex only
for very short times.
* the vnode mutex is no longer held during file cache construction; instead,
the vnode is marked busy.
* Implemented an (incorrect for now) get_advisory_lock()
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16635 a95241bf-73f2-0310-859d-f6bbb57e9c96
a modified page that mustn't be removed. This fixes bug #110.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16613 a95241bf-73f2-0310-859d-f6bbb57e9c96
of that list.
* Added a vfs_free_unused_vnodes() function that calls the low memory handler
directly.
* create_sem_etc() now calls the above function in case there are no semaphores
available anymore; this usually frees up to 2 semaphores per node (one from
the cache if there is a file cache attached, and eventually one from the
file system).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16610 a95241bf-73f2-0310-859d-f6bbb57e9c96
or vm_cache_ref couldn't be created, instead of cleaning up and returning
an appropriate error.
* vm_cache_ref_create() no returns a status_t instead of the vm_cache_ref
(as that's part of the vm_cache anyway).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16602 a95241bf-73f2-0310-859d-f6bbb57e9c96
that put one or more full paths on the stack before, which could cause some
problems under certain conditions.
* Cleaned up KPath, ie. use size_t instead of int32 where appropriate, added
license.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16585 a95241bf-73f2-0310-859d-f6bbb57e9c96
longer pushing a whole path on the stack.
* open_module_list() now adds the prefix to the paths it puts on the
stack to reduce the amount of searching to do (this probably wasn't
done before because of the earlier boot method via bootfs which
didn't allow for deep path names).
* module.c is now module.cpp (for KPath usage).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16584 a95241bf-73f2-0310-859d-f6bbb57e9c96
(mounting still only works from the Terminal).
* Shuffled functions in node_monitor.cpp around to clearly differentiate between
private, private kernel, and public kernel functions.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16575 a95241bf-73f2-0310-859d-f6bbb57e9c96
before another one in the list.
* The video modes in the boot loader are now sorted (by resolution, larger
resolution comes first). Doubled entries are automatically removed; this
fixes bug #192.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16572 a95241bf-73f2-0310-859d-f6bbb57e9c96
action has been set for the signal. If so, it doesn't try to install a
debugger, but simply lets the caller deliver the signal.
Fixes bug #237 (VLC entering the debugger when checking for processor
extensions).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16556 a95241bf-73f2-0310-859d-f6bbb57e9c96
modified to panic when an invalid block is requested (to find fs errors)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16537 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed broken "full sem" mechanism.
* Fixed recycling of previously mapped IO space chunks. Should avoid the
panic() call earlier introduced by Marcus.
(tracked down by axeld and bonefish over the course of three days
(in between skiing) and finally nailed on the bus back home)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16511 a95241bf-73f2-0310-859d-f6bbb57e9c96
This should eliminate the cases where commands doesn't seem to be accepted (but look fine on screen).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16453 a95241bf-73f2-0310-859d-f6bbb57e9c96
if "syslog_debug_output" was set to "true". Reported by Jerome!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16290 a95241bf-73f2-0310-859d-f6bbb57e9c96
the device manager is initialized. For x86 it does nothing, but
for PPC it searches for a supported interrupt controller and
remembers it for later use.
arch_int_{enable,disable}_io_interrupt() are implemented as
well as handling of external exceptions (aka as I/O interrupts).
We'll see later how well that works.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16271 a95241bf-73f2-0310-859d-f6bbb57e9c96
returns the root device node. Now its actually possible to
traverse the device node tree without a node to start with.
* Fixed execution order problem in dm_get_next_child_node(). The
supplied node was put first (which could cause its immediate
deletion), but was still accessed thereafter.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16268 a95241bf-73f2-0310-859d-f6bbb57e9c96
time of the idle thread as a measure, we now compute the CPU activity on
each thread switch - the time the CPU worked is the total of user and kernel
time a thread spent during its quantum.
Unlike before, this mechanism works correctly on SMP machines. I hope this
works as expected :)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16193 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added syscalls _kern_set_cpu_enabled() and _kern_cpu_enabled().
* scheduler.c::sRunQueue::tail was not maintained at all; changed sRunQueue to
be a simple thread pointer instead of a struct thread_queue.
* Turns out we're monitoring CPU activity incorrectly when we've got more
than one CPU.
* Renamed the global CPU array from "cpu" to gCPU.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16186 a95241bf-73f2-0310-859d-f6bbb57e9c96
synchronization as done in init_mtrrs() failed because of that (let the system
hang).
Unfortunately, MTRR still doesn't work on my dual PIII with SMP enabled; that
was just one reason it didn't work.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16173 a95241bf-73f2-0310-859d-f6bbb57e9c96
The test application lets run a thread at the highest priority that calls
yield all the time - the system stays responsible when it runs, so it seems
to work fine :)
Changed the malloc implementation to use _kern_thread_yield() instead of
snoozing.
We should think about making this call public, too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16166 a95241bf-73f2-0310-859d-f6bbb57e9c96
enqueueing a thread to the run queue.
This mechanism is now used for the thread priority boost on semaphore
release. Also, those threads are no longer made real time threads, they
now get a temporary priority of B_FIRST_REAL_TIME_PRIORITY - 1.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16165 a95241bf-73f2-0310-859d-f6bbb57e9c96
It now works fine on my P4 system as well :-)
But since the BIOS area is not identity mapped, it might work on fewer systems
than it does in BeOS R5.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16154 a95241bf-73f2-0310-859d-f6bbb57e9c96
on at least one of my systems, it only works on 3 of them...).
* Added APM safemode setting.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16152 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added a thread priority column to the thread list.
* Added "realtime" command that lists all real-time threads.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16141 a95241bf-73f2-0310-859d-f6bbb57e9c96
* cached_block::parent_data can be NULL in a sub transaction in case the
block wasn't part of the parent transaction (but not in low memory
situations). cache_abort_sub_transaction() and cache_detach_sub_transaction()
didn't account for this, though, ie. the block data could end up
corrupted.
* Renamed cached_block::original in original_data.
* Renamed cached_block::data in current_data.
* Added some comments.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16108 a95241bf-73f2-0310-859d-f6bbb57e9c96
cache_abort_sub_transaction now doesn't crash if parent_cache is NULL (happens in low memory situations)
Axel, please review and fix if needed
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16105 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Moved the Open Firmware function platform_get_next_device() from
the boot loader into the kernel (renamed to of_get_next_device()).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16101 a95241bf-73f2-0310-859d-f6bbb57e9c96
* BEntry::Remove() now uses _kern_remove_dir() for directories.
* Added fd parameter to _kern_remove_dir().
* Fixed LibBeAdapter's _kern_unlink() to only work on files, and
added _kern_remove_dir() for directories.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16078 a95241bf-73f2-0310-859d-f6bbb57e9c96
* exchanged sBlueScreenEnabled and sBlueScreenOutput (so that they better
match the sSerialDebugEnabled and sSyslogDebugEnabled variables).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16077 a95241bf-73f2-0310-859d-f6bbb57e9c96
can now safely unmount volumes that are still in use by some applications.
Minor fixes to the FD disconnection implementation:
* put_fd() checked the condition for being able to disconnect a descriptor
incorrectly (causing the FD to never be disconnected).
* remove_fd() would hand out disconnected descriptors (but should have
returned NULL for them).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15952 a95241bf-73f2-0310-859d-f6bbb57e9c96
code. The stack pointer was not adjusted, hence we were
overwriting the previous register value. But it looks like I
missed to check in the arch_cpu.h with the iframe structure
including the floating point registers anyway.
* Backported the ELF PPC relocation code from the boot loader to
the kernel.
* Fixed the PPC version of arch_thread_switch_kstack_and_call().
Apparently the signature had changed, but the assembly
implementation was not adjusted accordingly.
* sc prints more registers now (LR, CR, CTR, XER,...).
* Fixed several occurences of not-working fault handlers.
Apparently the compiler realized, that the "error" label was
never jumped to (by the code it knew), and optimized the
respective code away. Now we use a trick to make it think the
error label might actually be jumped to. I wonder whether the
x86 version has the same problem when being compiled with GCC4.
* Adopted the x86 page fault handling interrupt code.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15933 a95241bf-73f2-0310-859d-f6bbb57e9c96
context switches and all FPU registers in an iframe. We might want
to rethink this, though.
The kernel initialization runs to the end now. No boot volume is
found yet, but that is expected.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15908 a95241bf-73f2-0310-859d-f6bbb57e9c96
too -- introduced a function ppc_kernel_thread_root() which calls the
three functions (entry, start, exit) in sequence. This brings us well
into the second part of the kernel initialization.
* Replaced stmw/lmw in ppc_context_switch() by individual stwu/lwzu
sequences. The former ones are documented to perform suboptimal on
some architecture implementations.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15904 a95241bf-73f2-0310-859d-f6bbb57e9c96
the previous implementation of arch_cpu_global_TLB_invalidate() back in
place (as fallback).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15902 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Cloned iframe stack management from x86.
* Reimplemented arch_thread_{get,set}_current_thread(). The
thread structure is stored in SPRG2. It is set to NULL in
arch_cpu_preboot_init(), now. A non-null current thread
causes all kinds of undesired behavior in early boot code.
* We establish the address space mappings we know from the
Open Firmware as areas. At least those in kernel address
space. The ones in userland address space are tougher.
Fortunately on my Mac mini there aren't any save the
boot_loader stack, which is not needed any longer anyway.
* Added stack trace support to the kernel debugger. Mostly
cloned and adjusted the x86 code. Some bits are still
missing, like stack traces for other threads.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15890 a95241bf-73f2-0310-859d-f6bbb57e9c96
* In reserve_boot_loader_ranges() we skip ranges that lie without
the kernel address space (we failed and panic()ed before). The
architecture specific code has to deal with those, if they are
of any importance.
* sAvailableMemoryLock.sem was not set to -1 in vm_init() so code
executed after semaphores were available but before the semaphore
was created caused semaphore 0 to be acquired.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15889 a95241bf-73f2-0310-859d-f6bbb57e9c96
void after turning off BAT for the segment containing itself.
The monster macro for the exception vector code was not really
elegant besides being too long for the 32 byte performance
monitor exception slot. Furthermore wasting three of the SPRG*
registers as cheap scratch memory wasn't that nice either.
We now have a three-step approach: The exception vectors
themselves contain only five instructions which branch to common
code at the beginning of the same physical page. That one sets
up BAT for itself, turns address translation back on and jumps
into the kernel. There we turn off BAT again, dump an iframe,
and enter the actual exception handler (/dispatcher). Upon return
the registers are restored from the iframe and we get back to the
place where the exception occurred.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15881 a95241bf-73f2-0310-859d-f6bbb57e9c96
The time base conversion factor is the 32 bit value
2^32 * 1000000 / time base frequency,
so the system time can be computed by
system time = time base * conversion factor / 2^32.
The expression in system_time() looks more complicated now, but is
actually much faster (factor 2.5 on my Mac mini). I'm positively
surprised, how good the assembly looks, that GCC 4 generates. There's
not that much potential for optimization by hand-coding the function.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15863 a95241bf-73f2-0310-859d-f6bbb57e9c96
and real_time_clock[_usecs]() finally seem to work (at least in
the kernel).
* Removed accidentially committed debug output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15861 a95241bf-73f2-0310-859d-f6bbb57e9c96
is actually not that nice for PPC since we don't have large pages.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15860 a95241bf-73f2-0310-859d-f6bbb57e9c96
parts, too. Fixed a potential overflow.
* The generic physical page mapper reserves the virtual address range
for the IO space now, so that noone can interfere until an area has
been created. The location of the IO space is no longer fixed; it
didn't look to me like it was necessary for x86, and we definitely
need to be flexible for PPC.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15855 a95241bf-73f2-0310-859d-f6bbb57e9c96
"IO space" out of the x86 specific source into arch/generic. We'll use
it for PPC as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15853 a95241bf-73f2-0310-859d-f6bbb57e9c96
device in the Open Firmware implementation of boot loader and
pass its path to the kernel, where it's opened and used for
getting/setting the real time. The expensive atomic_*64() on PPC
32-bit make things a bit more complicated. Moreover, missing
64 bit multiplication and division instructions won't really
allow system_time() to be anywhere near as fast as on x86. :-/
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15837 a95241bf-73f2-0310-859d-f6bbb57e9c96
substructure now (that's the only member actually). The system time
offset is therefore accessed via architecture specific accessor
functions.
Note, that this commit breaks the PPC build. Since I want to rename at
least one file I've already changed, I can't avoid that.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15835 a95241bf-73f2-0310-859d-f6bbb57e9c96
(year, month,...) representation out of the x86 specific code and put
respective support functions into real_time_clock.c. We'll need those
for the PPC specific part too.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15827 a95241bf-73f2-0310-859d-f6bbb57e9c96
Basically the architecture specific code is now responsible to
init and make use of the platform specific code, now. The reason
being that we have only one kernel per platform and thus cannot
decide at compile time, which platform to use (if any).
The PPC implementation features an abstract base class PPCPlatform
(implemented for all supported platforms) through which platform
support is provided.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15824 a95241bf-73f2-0310-859d-f6bbb57e9c96
bus, and time base frequency) in the PPC boot loader, and propagate
them to the kernel via kernel_args.
* Now we use the correct time base frequency for timer calculations.
* Implemented PPC specific system info stuff. Added a few PPC CPU
types to <OS.h>.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15817 a95241bf-73f2-0310-859d-f6bbb57e9c96
remapping stuff into separate functions and made them available to
others.
* Remap the exception handler space in arch_int_init_post_vm() into the
kernel address space (same issue as with the page table).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15783 a95241bf-73f2-0310-859d-f6bbb57e9c96
the fact that I couldn't find ptesync in an otherwise more complete
documentation I downloaded yesterday made me suspicious.
* arch_cpu_global_TLB_invalidate() uses tlbia now. The instruction is
optional, but so is tlbie (how I understood it is that both exist,
when the architecture implementation has a TLB). And the former loop
looked just scary.
* Implemented arch_cpu_user_TLB_invalidate(). It does just the same as
arch_cpu_global_TLB_invalidate().
* Some changes with respect to synchronization required on page table
and segment register updates.
* Some more minor renaming. Pulled a new function
remove_page_table_entry() out of unmap_tmap().
* In arch_vm_translation_map_init_post_area() we do now remap the page
table into the kernel address space, if it was without before. The
page table might actually be a good application for BAT, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15773 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Renamed occurrences of ASID/asid to VSID/vsid where appropriate.
* vm_translation_map_arch_info::vsid_base is now the first usable
VSID and doesn't need to be shifted anymore.
* Changed the VSID base shift from 4 to 3, since we need only 8 VSIDs
per team.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15772 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed several off-by-one comparisons with num_pages.
* vm_alloc_virtual_from_kernel_args() now makes sure the allocated
region lies within the kernel address space (or is at least
>= KERNEL_BASE).
* Simplified one or two patches.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15771 a95241bf-73f2-0310-859d-f6bbb57e9c96
