paging support to KDL (but not the on-screen debug output for now).
* Defaults to "on", use the new "paging" KDL command to turn it off (or on
again).
* When pressing 'q' while it is waiting for a key, it will now eat the rest
of the commands output (helpful for slow screen output of a large data set).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23566 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed the usage text of the "help" KDL command.
* Made the "ambiguous command" warning shorter, so that it will still fit in
the exception buffer.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23565 a95241bf-73f2-0310-859d-f6bbb57e9c96
* As a temporary work-around for the current slab allocator's area usage,
I added the CACHE_LARGE_SLAB flag, which will force the allocator to
use larger areas.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23564 a95241bf-73f2-0310-859d-f6bbb57e9c96
value greater or equal its size (actually untested, but at least Haiku
still boots with these changes :-)).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23563 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added some temporary variables to the commands.
* Use parse_expression() where appropriate.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23556 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed removing temporary variables (they would always be removed except one
after the first command).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23555 a95241bf-73f2-0310-859d-f6bbb57e9c96
Now starts doing stuff in the loader when bootstrapping the .prg from ARAnyM.
For now it just dumps the cookies.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23552 a95241bf-73f2-0310-859d-f6bbb57e9c96
debugger expression language. By default it reads a uint32 value.
Another target size (1, 2, 4, or 8 bytes) can be specified in braces
after the "*" (e.g. "*{2}address" for uint16).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23551 a95241bf-73f2-0310-859d-f6bbb57e9c96
* The kernel debugger does now define some temporary variables when
entered (current thread and team, etc.).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23549 a95241bf-73f2-0310-859d-f6bbb57e9c96
that is a little more powerful than BeOS'. It features:
- Persistent and temporary uint64 variables. The former kind is set
only by the user. The latter (those prefixed "_") can be set
automatically by commands, thus e.g. making it easier to access
members of a dumped structure. They are unset when the next command
is invoked. The special temporary variable "_" is defined as a
command's return value.
- Expressions can contain nested command invocations using brackets
("[ ... ]").
- Command lines are parsed by the expression parser, too. They can
contain command invocations (in brackets) and expressions (in
parentheses).
* Added debugger commands:
- expr: Evaluates the given expression and prints the result.
- unset: Undefines a variable.
- vars: Prints the values of all defined variables.
* Moved debugger command code into its own source file.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23546 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Made the block_cache KDL command dump a bit more useful info (number of
referenced and dirty blocks).
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23540 a95241bf-73f2-0310-859d-f6bbb57e9c96
* with 1 GB or more, the semaphore limit is now 131072 instead of 65536.
* double the heap when there is 1 GB or more (64 MB).
* the low memory handler now also watches semaphore usage; in the end,
we need a low resource handler, not a low memory handler.
* create_sem_etc() no longer calls vfs_free_unused_vnodes() directly as
this could actually deadlock (at least because the address space is a
R/W lock, not a recursive lock).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23538 a95241bf-73f2-0310-859d-f6bbb57e9c96
when a pattern was involved).
* alloc_tracing_buffer() no longer allocates anything when you ask for
a zero byte buffer.
* Fixed warning.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23533 a95241bf-73f2-0310-859d-f6bbb57e9c96
* improved the "block_cache" KDL command: it can now also dump blocks,
added support for the "--help" argument.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23532 a95241bf-73f2-0310-859d-f6bbb57e9c96
* More test code
* it actually runs now, till _start.
However, calling TOS from C is broken: we use 32 bit param alignment on funcs, but TOS expects 16 bit... need to use asm macros instead of funcs.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23531 a95241bf-73f2-0310-859d-f6bbb57e9c96
* also added fake FAT descriptors to avoid crashing TOS, but it doesn't boot yet as floppy.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23525 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Don't execute a command anymore, if the given prefix is ambiguous.
* Added tab completion for commands.
* Added on-the-fly help while typing a command line. It is triggered
by pressing tab at a position after the space following the command.
It is implemented by calling the command with argument "--help", which
doesn't work yet with most commands, but some already print their
usage in this case.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23521 a95241bf-73f2-0310-859d-f6bbb57e9c96
now, not the number of entries shown (much more usable this way).
* Added missing license.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23520 a95241bf-73f2-0310-859d-f6bbb57e9c96
system when pressed during the boot process, as intended.
* Removed other incorrect key codes, except the one for BREAK, since it
is used (but won't work).
* Ctrl-Alt-Del now also resets the machine when in KDL, at least when
waiting for user input.
* arch_debug_blue_screen_getchar() does also generate the respective
escape sequences for HOME, END, and DELETE, now. Furthermore it
generates characters for Ctrl-A through Ctrl-Z.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23512 a95241bf-73f2-0310-859d-f6bbb57e9c96
any devices anymore it gets unloaded. Also made sure the function pointers
are properly initialized and disabled debug output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23494 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Fixed wrong start and size used in the runtime_loader
* Fixed off by one error in the matching loop of the cleanup hook
* Make sure we successfully acquire the locking sem of the exit stack
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23493 a95241bf-73f2-0310-859d-f6bbb57e9c96
transaction ends or has been aborted.
* BFS now listens for transactions when it created an inode to see if
the transaction will be aborted without freeing the inode (in which
case it will panic for now).
* Started implementing tracing support, but it's not working yet.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23492 a95241bf-73f2-0310-859d-f6bbb57e9c96
though there was nothing to do (if 'diff' was larger than 'needed').
* Improved KDL command output.
* Added debug output to the allocation functions.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23491 a95241bf-73f2-0310-859d-f6bbb57e9c96
As (our) gcc unfortunately uses atexit() to clean up lazily initialized static
variables inside functions we have to ensure that we do the right thing with
unloadable shared objects. In case a shared object was unloaded that installed
an atexit() hook the application would crash on exit. We now implement a
callback into libroot that is used to call all the atexit() hooks of a
component that is to be unloaded. Most prominently this fixes the media_server
crash at shutdown.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23486 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added tool to calculate the checksum (TOS wants a real one to 1234, not aa55).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23483 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added function to allocate space in the buffer.
* Dump() now fills a buffer instead of printing its data directly.
* This allows the new "#pattern" argument of the "traced" command to
work. When you're using that, the index of the trace entry is printed
out, too, so that you can then get a full dump around the hits.
* Added an AddDump() method to the AbstractTraceEntry class so that
there is no need to call the inherited function anymore.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23479 a95241bf-73f2-0310-859d-f6bbb57e9c96
will not accept if the allocator returns NULL and crashes instead
(ie. not compiling in tracing would have crashed if some module tried
to use it).
* Added total entries count to the KDL command output.
* Fixed computing the start index of the KDL command.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23460 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Implemented an optional tracing layer that can be used in the kernel.
Nice to use if you don't have serial output or need something that doesn't
slow down the system as much.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23447 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vfs_disconnect_vnode() did not put away its vnode reference.
* disconnect_mount_or_vnode_fds() did always throw the current working
directory of all apps on the same mount away, even if only a specific
vnode should have been disconnected.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23445 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Cache the looked up image symbols as well as the API version in the driver entry
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23441 a95241bf-73f2-0310-859d-f6bbb57e9c96
* remove some unneeded stuff in start.
* we just quit the boot prg instead of rebooting (should try Puntaes also)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23440 a95241bf-73f2-0310-859d-f6bbb57e9c96
Actually getlogin didn't belong to usergroup.c in the first place anyway.
And definitely not to the kernel.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23391 a95241bf-73f2-0310-859d-f6bbb57e9c96
Worked quite well in latest zeta, so it's already tested :)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23385 a95241bf-73f2-0310-859d-f6bbb57e9c96
23139 into trunk, with roughly the following changes (for details svn
log the branch):
* The int 99 syscall handler is now fully in assembly.
* Added a sysenter/sysexit handler and use it on Pentiums that support
it (via commpage).
* Got rid of i386_handle_trap(). A bit of functionality was moved into
the assembly handler which now uses a jump table to call C functions
handling the respective interrupt.
* Some optimizations to get user debugger support code out of the
interrupt handling path.
* Introduced a thread::flags fields which allows to skip handling of
rare events (signals, user debug enabling/disabling) on the
common interrupt handling path.
* Got rid of the explicit iframe stack. The iframes can still be
retrieved by iterating through the stack frames.
* Made the commpage an architecture independent feature. It's used for
the real time data stuff (instead of creating a separate area).
* The x86 CPU modules can now provide processor optimized versions for
common functions (currently memcpy() only). They are used in the
kernel and are provided to the userland via commpage entries.
* Introduced build system feature allowing easy use of C structure
member offsets in assembly code.
Changes after merging:
* Fixed merge conflict in src/system/kernel/arch/x86/arch_debug.cpp
(caused by refactoring and introduction of "call" debugger command).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23370 a95241bf-73f2-0310-859d-f6bbb57e9c96
resized but still had dirty pages to be written back,
vm_cache_resize() (which is called with the inode lock being held)
deadlocked with the page writer.
* Now, I reintroduced busy_writing: it'll be set by everything that
writes back pages (vm_page_write_modified(), and the page writer),
and will be checked for in vm_cache_resize() - other functions are not
affected for now, AFAICT.
* vm_cache_resize() will clear that flag, and the writer will check it
again after it wrote back the page (which will fail when it's outside
the file bounds), and if it's cleared, it will get rid of the page
(if the file has been resized again in the mean time, writing it will
succeed then, and we'll keep the page around).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23334 a95241bf-73f2-0310-859d-f6bbb57e9c96
appear: when freeing a modified page, it wouldn't have a cache
anymore, but set_page_state_nolock() depended on it.
* To work around this, I added a vm_page_free() function, which the
caches that free modified pages have to call (but others may, too).
It will correctly maintain the sModifiedTemporaryPages counter in case
the cache has already been removed.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23318 a95241bf-73f2-0310-859d-f6bbb57e9c96
a function in the stack trace (only works reliably when a stack frame
is exists, and you'll have to know the number of arguments).
* Refactored the functions a bit and extracted setup_for_thread() out
of stack_trace() to be used by show_call() as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23316 a95241bf-73f2-0310-859d-f6bbb57e9c96
NULL (it's not used anywhere yet, anyway).
* Fixed warning when compiling with tracing turned on.
* Some cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23267 a95241bf-73f2-0310-859d-f6bbb57e9c96
set when the first chunk of the file could be read in directly, causing it
to read data to a wrong place in the buffer.
* Reading in the first chunk directly would have also only worked if vecIndex
and vecOffset was 0 when calling the function.
* Applied the fs_shell changes in file_map to the kernel version as well (the
constructor already worked correctly, though).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23265 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Minor style cleanup in the conversion factor calculation
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23217 a95241bf-73f2-0310-859d-f6bbb57e9c96
* When disabling SMP initialization of those parts is avoided so it works more cleanly
* Moved smp_find_mp_config() into smp_init() and moved MPS specific parts into smp_do_mp_config()
* Removed the global floating struct, if found it is now passed into smp_do_mp_config() like it is done for ACPI
* Made the file a bit more C++, applied coding style to some variable names and unified/improved some of the debug output
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23216 a95241bf-73f2-0310-859d-f6bbb57e9c96
the problem that the parent partition was still referenced in some cases.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23172 a95241bf-73f2-0310-859d-f6bbb57e9c96
and it's checked if a chunk is already in the free list, and if any chunk
has an invalid size. It's defined for now.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23171 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Insert the pause op in all spin wait loops (as macro for platform independent sources or as inline assembly on x86 only files)
* Fix some warnings with tracing on and extended some output
* Minor cleanups here and there
The pause instruction is implemented since P4 systems but is fully backwards compatible (it's a no-op prior to P4). According to Intel specs it reduces performance penalties as memory order violations can be avoided. Also power consumption is reduced. Most of all this will be beneficial to hyper-threading systems as it frees resources to the other logical processor when one logical processor executes a fast spinning loop.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23141 a95241bf-73f2-0310-859d-f6bbb57e9c96
* ACPI is evaluated first as it also handles things like multi core or hyper threading setups
* Removed other (disabled) hyper threading code per the notes in the corresponding ToDo
* Limit the detected CPU count to 2 for now as I wasn't able to get it working in either emulation nor real hardware with more than 2 CPUs
* Added a reserved byte to the mp_config_table struct, it worked only by luck as the compiler did padding there to get to the same size
I can now boot my Core 2 Quad with two out of four processors active :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23100 a95241bf-73f2-0310-859d-f6bbb57e9c96
the inode's internal last modified and size copies, causing in inconsistent
data. This fixes#1643.
* The block being replayed are now dumped to the debug output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23050 a95241bf-73f2-0310-859d-f6bbb57e9c96
team ID argument, instead of only being able to dump the images of the current
team.
* The debugger commands are now now also built-in without the DEBUG flag set
(for now).
* _get_next_image_info() now also supports the B_SYSTEM_TEAM constant.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23011 a95241bf-73f2-0310-859d-f6bbb57e9c96
exit status of (non-main) threads of a team. Fixes bug #1644.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23009 a95241bf-73f2-0310-859d-f6bbb57e9c96
passes that information on to the kernel. This should fix wrong bytes per row with
certain resolutions and graphics cards.
* The boot loader now recognizes 15 bit modes that are advertised as 16 bit modes.
This should fix wrong colors in 16 bit modes on some cards.
* Reenabled setting MTRR for VESA mode - don't remember why I disabled it, but it
works fine on my test machines.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23006 a95241bf-73f2-0310-859d-f6bbb57e9c96
serial output, and puts it into the new kernel_args::debug_output field.
* syslog_init() will now check if there is anything in kernel_args::debug_output
and will put that into the syslog buffer.
* dump_block() now also prints an offset.
* Fixed warning in mmu.cpp.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23003 a95241bf-73f2-0310-859d-f6bbb57e9c96
one too low in comparison with BeOS (ie. the end pointer was inclusive, now
it's exclusive).
* Moved static functions fill_thread_info(), and {send|receive}_data_etc() to
the private function section.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22945 a95241bf-73f2-0310-859d-f6bbb57e9c96
tried to access the uninitialized vnode in that case).
* That means that it's now safe to remove a mounted CD from the drive, it
will then be unmounted automatically.
* Added a check for partition::Device() - even though Ingo tells me it's
impossible, it was NULL once.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22922 a95241bf-73f2-0310-859d-f6bbb57e9c96
check the fTerminating flag, so it would never quit (too bad no one ever quits
it anyway :-)). Thanks for proofreading!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22919 a95241bf-73f2-0310-859d-f6bbb57e9c96
* it now updates the partition data,
* the flags,
* and the disk geometry - and that now allows the session add-on to actually
detect a newly inserted CD.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22918 a95241bf-73f2-0310-859d-f6bbb57e9c96
the complete extent info or not.
* file_map_translate() now cuts down the request to the file bounds.
* Adjusted BFS and FAT to the API changes.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22913 a95241bf-73f2-0310-859d-f6bbb57e9c96
device geometry.
* If SetTo() reports no media, and GetGeometry() fails, the device geometry
is now reset as well.
* KDiskDeviceManager::_ScanPartition() no longer unmarks the partition busy;
this is now done by the caller, and done independently from the outcome of
_ScanPartition(). This also fixes the problem that devices with no media
were never marked unbusy (and thus were ignored subsequently).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22912 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Added vfs_unmount(), which allows unmounting by dev_t (used by the DDM).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22910 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Unmount when uninitializing a partition.
* Finished the media checker implementation, i.e. we rescan when a media
was inserted and uninitialize when ejected.
* Turned the disk device media checker from a kernel daemon into a thread.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22909 a95241bf-73f2-0310-859d-f6bbb57e9c96
defined in the headers. If this is not the correct way to do this, let me
know, but it seems to work (well it compiled at least.)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22890 a95241bf-73f2-0310-859d-f6bbb57e9c96
that can be used by file systems.
* Changed the way the file cache works: instead of reading/writing to the
underlying device directly, it can now be used for any data source, ie.
also network file systems.
* As a result, the former pages_io() moved to the VFS layer, and can now be
called by a file system via {read|write}_file_io_vec_pages() (naming
suggestions are always welcomed :-)). It now gets an FD, and uses that to
communicate with the device (via its fs_{read|write}_pages() hooks).
* The file_cache_{read|write}() functions must now be called without holding
an I/O relevant file system lock. That allows the file cache to prepare the
pages without colliding with the page writer, IOW the "mayBlock" flag can
go into the attic again (yay!).
* This also results in a much better performance when the system does I/O and
is low on memory, as the page writer can now finally write back some pages,
and that even without maxing out the CPU :)
* The API changes put slightly more burden on the fs_{read|write}_pages()
hooks, but in combination with the file_map it's still pretty straight
forward. It just will have to dispatch the call to the underlying device
directly, usually it will just call its fs_{read|write}_pages() hooks
via the above mentioned calls.
* Ported BFS and FAT to the new API, the latter has not been tested, though.
* Also ported the API changes to the fs_shell. I also completely removed its
file cache level page handling - the downside is that device access is no
longer cached (ie. depends on the host OS now), the upside is that the code
is greatly simplified.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22886 a95241bf-73f2-0310-859d-f6bbb57e9c96
system by pretty name (not only module name) now.
* _user_initialize_partition() loads the disk system by pretty name.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22880 a95241bf-73f2-0310-859d-f6bbb57e9c96
did not propagate the "dontWait" argument, letting the page writer never wait
for its pages.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22860 a95241bf-73f2-0310-859d-f6bbb57e9c96
and write_to_cache() before, IOW the cache could reserve too few pages.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22859 a95241bf-73f2-0310-859d-f6bbb57e9c96
needed pages correctly, and would also not read/write enough in case the
offset didn't start at 0 resulting in undetected short reads/writes. It's
amazing how many bugs can be hidden in a few lines of code.
* Fixed a bug that might have been the cause for bug #1601: when the last part
of the write did not end on a page boundary, the last page had to be read
first, but that was done from the wrong offset. Also, if only parts of that
page could be read (because the file size didn't span over the whole page)
the remaining parts needed to be cleared.
* The cache_funcs were always called with the same value for numBytes and
bufferSize so I've eliminated the former.
* Large reads now also bypass the cache in case of low memory, large writes now
also only bypass the cache in that case, following Ingo's suggestion.
* Fixed compilation with debugging turned on.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22858 a95241bf-73f2-0310-859d-f6bbb57e9c96
than 64KB. Reads should probably get a similar logic, at least if memory is
tight.
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the same pages over and over.
* Increased the priority of the page writer a bit, so that it is higher than
the one of the page daemon.
* Added a sModifiedTemporaryPages counter to let the page_writer decide how
many pages are there to write back (temporary pages would go to the swap file
and are only written back when memory is low).
* In case there are more than 1024 modified (non-temporary) pages around, the
page writer will constantly write out pages, not only when being pushed.
* The page writer now temporarily always leave out temporary pages (as long as
we don't have a swap file).
* Shuffled functions around a bit.
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on pages are recorded in a history and can be printed via the
"page_allocations" command.
* Fixed a problem in the page scrubber. It temporarily removed pages
from the free list, which could have been reserved by someone else.
When actually allocating the reserved pages, that someone could find
free and clear lists empty and would therefore rightfully panic
("Had reserved page, but there is none!").
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non-reserve case.
* vm_page_allocate_page() could also lose a stolen page in case more free pages were available
after steal_pages() was called.
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K{Disk,File,Partitioning}System writing methods. It is now required
that the caller has marked the concerned partitions busy, hence we can
(read-)access them without needing a lock. The module interfaces will
will be changed to take advantage of the fact as well. The methods take a
disk_job_id instead of a KDiskDeviceJob* now, though I haven't quite
decided, whether we need it at all or just want to add a special
handling in the cases where notifications during the operation make
sense.
* Reimplemented the disk device write support syscalls (save
_user_move_partition() for which other module hooks are needed). They
call the KDiskSystem methods, now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22832 a95241bf-73f2-0310-859d-f6bbb57e9c96
synchronous scanning is supported.
* Removed the disk device job support from the disk device manager.
* K{Disk,File,Partitioning}System:
- Remove querying and validation methods.
- Commented out the modification methods until their fate is decided.
* Removed obsolete _user_get_partitionable_spaces().
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- use movem
- fix return value: the convention is to return in d0:d1 (MSB:LSB)
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(_kern_{supports,validate}_*(), etc.).
* Adjusted the prototypes of the disk device modification syscalls.
Commented out their implementations for the time -- they'll mostly
have to be rewritten completely.
* Implemented the userland disk device jobs.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22781 a95241bf-73f2-0310-859d-f6bbb57e9c96
Lure the preprocessor to not replace #n by "123" for syscalls...
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sequential access.
* This is now used to let the cache free some pages (or schedule them to be
written back) before vm_reserve_pages() is called, but only if that cache
is not mapped, and there is a memory shortage.
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doing something. If the signal is not valid, set errno and return -1.
Mini style changes by myself.
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for this reason, we don't add such a node in the list of nodes to be scanned
this fixes the bug #1578
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22726 a95241bf-73f2-0310-859d-f6bbb57e9c96
returns success - since this stub always returned failure, this prevented all
apps using that library (like Gobe Productive) from running.
It now calls the Haiku equivalent _kern_lock_node(), and Gobe now runs fine!
This closes bug #562.
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68030 invalidates only 1 long of a cache line each time.
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The low memory handler now has two passes which should help there; however, it
might also accidently remove recently used vnodes, too. We could mark the clean
ones in some way if that turns out to be a problem.
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Small change and notes on standard compliance by myself.
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status checker now only tries to lock the manager, it won't wait anymore.
* Added MediaChanged() and UpdateMediaStatusIfNeeded() methods to KDiskDevice.
* KDiskDeviceManager::_CheckMediaStatus() now uses these new methods; it should
no longer detect removed media more than once :-)
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* Use strlcpy() to copy the confstr instead of strncpy().
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and van Flandern (1968), instead of those inefficient loops we had before.
Thanks!
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not work; it would always choose the last thread of the current priority.
IOW a thread was never skipped, and lower priority threads were never called
when a higher priority thread was running - from the POV of the scheduler,
we only has real time threads...
* Improved "run_queue" KDL output.
* Minor cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22515 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Removed old port test code, it doesn't belong there.
* Cleanup.
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vm_page_reserve_pages() and vm_page_allocate_page() will now steal pages from
the inactive queue as needed.
* We currently never steal active pages anymore, but this might need to be
revised later (therefore, the page scanner never waits anymore, but uses
mutex_trylock() to lock a cache).
* The page scanner and writer now both run at normal priority - let's see how
that will work out.
* Introduced an inactive queue.
* Instead of shuffling pages around in the queue (and therefore destroying LRU)
the page stealing mechanism now uses a marker page to be able to release the
page lock without losing its position in the queue.
* The page writer now always grabs the whole release count of the semaphore, so
that there won't be a huge backlog to catch up with.
* vm_page_num_free_pages() now also includes the inactive queue as well as the
reserved pages (they are no longer regarded as free pages).
* Added a insert_page_after() function that inserts a page after another one,
needed by the marker code.
* clear_page() now gets a vm_page instead of a physical address which simplified
some code.
* Removed superfluous initialization of the queues (if those aren't zeroed on
start, we would have serious problems, anyway).
* Removed old and unimplemented dump_free_page_table() ("free_pages") KDL
command.
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* Fixed warnings with debug output turned on.
* Shuffled functions around a bit.
* Minor cleanup.
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vm_remove_all_page_mappings() all computed the wrong virtual address for the
page in question, and would therefore return incorrect data!
Introduced a virtual_page_address() function that is now used by all of them.
So that's why we were still "losing" modified flags - it took me some hours
to find those (sometimes processes died after stealing pages)...
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22498 a95241bf-73f2-0310-859d-f6bbb57e9c96
it intended to. That resulted in more writable pages where you wouldn't want
them (ie. allowing the area to change pages in lower caches).
* We were losing modified pages: vm_unmap_pages() sometimes has to preserve
the modified flag (eg. when called from page fault).
* Both of these were responsible that stealing active pages would crash
applications - even if less likely, this could also have happened when
stealing inactive pages. Therefore, I've activated stealing active pages
again.
* The page writer now pushes the pages of busy vnodes to the end of the queue,
so that it won't pick them up again too soon (the vnode destruction would
be in the process of writing those pages back, anyway).
* The page thief now triggers the page writer to run once it has to steal
active pages. This might be a bit too aggressive, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22495 a95241bf-73f2-0310-859d-f6bbb57e9c96
pages to reserve, which could result in to few being reserved in certain
situations.
* Use MutexLocker where appropriate.
* Reordered includes following the new rules.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22494 a95241bf-73f2-0310-859d-f6bbb57e9c96
* uname() now calls gethostname() instead of using a hard-coded value.
* This fixes bug #1250.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22492 a95241bf-73f2-0310-859d-f6bbb57e9c96
the blue screen was initialized - blue_screen_enter() now returns wether
or not it has been initialized already (there will only be serial output
in that case).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22491 a95241bf-73f2-0310-859d-f6bbb57e9c96
* The page_thief() will no longer steal any pages in B_LOW_MEMORY_NOTE state,
only in the more serious cases.
* I've disabled stealing active pages for now again; there seem to be some
problems with it (either with how we do it, or with other stuff).
* vm_page_schedule_write_page() now always releases the page writer semaphore,
resulting in many more written pages - this isn't optimal as long as there is
no I/O scheduler, but before it was much too rare when there are many dirty
pages.
* Customized the thread priorities a bit to make the page scanner/thief/writer
experience a bit nicer with our current scheduler.
* vm_page_reserve_pages() would return too early, it did not test if really
enough pages are free.
* Under certain circumstances, the wakeup from vm_page_reserve_pages() did not
work - we now always notify in vm_page_unreserve_pages() to work around that
problem.
* Checked if the page reservations are done when needed and are always balanced
for the whole kernel.
* vm_page_allocate_page() now panics if it can't deliver a reserved page.
* vm_page_allocate_page_run() can no longer steal reserved pages.
* With all of those changes, I could finally copy a file in emulation, ie. the
Luposian bug should finally be fixed, even though the system might still not
be perfectly stable under low memory. Will do some more testing.
* write_page() no longer prints something on failure.
* Dumping a whole page queue will now also write the cache type of each page.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22486 a95241bf-73f2-0310-859d-f6bbb57e9c96
busy vnodes.
* dir_create_entry_ref() used get_vnode() incorrectly (and could therefore
potentially prevent a file system from doing proper locking when called
from the kernel).
* The vnode_store now uses this for its acquire_unreferenced_ref()
implementation (and therefore for the page writer).
* read_into_cache() and write_to_cache() were still marked inline.
* The system will now wait 10 secs for a busy vnode before returning an error.
* It will also no longer panic in that case.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22485 a95241bf-73f2-0310-859d-f6bbb57e9c96
* vm_low_memory_state() now periodically recomputes the state in case the
low memory thread is waiting for something.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22483 a95241bf-73f2-0310-859d-f6bbb57e9c96
We actually need to fail for sockets, too, but until I'm mistaken, we
can't identify them in the VFS. Fixes bug #1539.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22480 a95241bf-73f2-0310-859d-f6bbb57e9c96
additional partition_data* child parameter now.
* _user_get_partitionable_spaces() doesn't need to copy the buffer into
the kernel, since it is no input parameter. It also copies back the
actual partitionable spaces count on error, now -- B_BUFFER_OVERFLOW
is returned when the buffer was too small, but then the count must be
returned too.
* Fixed several instances of syscall implementations that unloaded a disk
system, although they didn't load it in the first place. This screwed
up the load count with undesirable consequences.
* _user_create_child_partition() would set the size to the supplied
offset.
* Fixed broken loop in KPhysicalPartition::CreateShadowPartition().
* KPartition::RemoveChild() notified the listeners about the wrong
event.
* Intel partitioning module:
- The *_get_partitionable_spaces() correctly return B_BUFFER_OVERFLOW
now, if the supplied buffer is too small.
- Implemented a part of pm_shadow_changed(), which creates and updates
the PartitionMap, so that the validate_*() hooks have a chance to
work at all.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22475 a95241bf-73f2-0310-859d-f6bbb57e9c96
but it is mandatory to the KDiskSystem::ValidateCreateChild(), which is
invoked, so we need to use a stack variable.
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physical partition, unlike get_partition() which returns the shadow
partition, if it exists.
* Added B_PARTITION_SHADOW[_CHILD] partition pseudo operation values for
the shadow_changed() hook, notifying a disk system, that a shadow
partition has been created.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22472 a95241bf-73f2-0310-859d-f6bbb57e9c96
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).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22449 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Corrected checking of parameters (name).
* Gracefully deals with disk systems that rescan after initialization,
now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22448 a95241bf-73f2-0310-859d-f6bbb57e9c96
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
does no longer give partitioning systems precedence over file systems.
The one with the greater identification priority wins. ATM, if a file
system wins, we still mount the first file system that recognized the
partition at all, though.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22446 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.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22438 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Made the kernel rootfs reusable by the FS Shell and removed the
copy in the FS Shell sources.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22436 a95241bf-73f2-0310-859d-f6bbb57e9c96
* 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.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22428 a95241bf-73f2-0310-859d-f6bbb57e9c96
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.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22416 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Changed ResAttr rule to allow not deleting the file before writing the
attributes.
* Added application signatures for the runtime_loader and zbeos, just so that
they may have an icon, too (hint, hint) :-)
* As a side effect, this also let's FileTypes handle these two as apps (even
though they aren't), so that I can close bug #606.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22412 a95241bf-73f2-0310-859d-f6bbb57e9c96
pointer - which it now handles gracefully.
* This also fixes starting the runtime loader directly: it no longer crashes
but will just return an error.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22409 a95241bf-73f2-0310-859d-f6bbb57e9c96
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().
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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.
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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.
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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.
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in enqueue_page() - it doesn't really belong there.
* Minor cleanup.
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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.
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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.
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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.
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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.
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* 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.
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* 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.
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* vm_low_memory() no longer calls call_handlers() directly, but just triggers
a run immediately.
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* Replaced release_sem() with release_sem_etc() for future addition of the
B_DO_NOT_RESCHEDULE flag.
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* 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
(yet) support any locale anyway, so evaluating LC_ALL and friends doesn't make
much sense at this point.
This fixes bug #1499.
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* Minor cleanup (there shall be 2 lines of space between functions).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22281 a95241bf-73f2-0310-859d-f6bbb57e9c96
don't block when they should because the semaphore sometimes gets released too
much. One day I'll try to add some tests, though this seems like something you
can't exactly unit test.
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them. I have tested this with a simple test program I downloaded
from the internet. We get the same result as on Linux, so I think
this is good. I will test it more with WebKit later.
Our Pthreads implementation is still missing some stuff, but this
adds a good chunk.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22274 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.
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reference count to drop below 0 there.
* Added TODO describing a serious race condition between free_vnode()
and the page daemon.
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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.
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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).
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* 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
* check against sizeof(void*)-1 instead of hardcoded 3.
* return B_NO_MEMORY instead of NULL if the allocation failed...
Thanks to Marcus and Ingo for proofreading :-)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21976 a95241bf-73f2-0310-859d-f6bbb57e9c96
compliant:
* it now checks the alignment is a multiple of 4 (needs to be changed for 64 bit architectures)
* it no longer sets errno.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21975 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
* Check for failed allocations and set errno correspondingly in malloc(), calloc(), memalign() and realloc()
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21911 a95241bf-73f2-0310-859d-f6bbb57e9c96
Someone please review. Should errno be set to ENOMEM here?
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21903 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
* Initial implementation of suggest_thread_priority. It behaves like version from BeOS R5.
* TODO take arguments 'period', 'jitter', and 'length' into account as well .
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21825 a95241bf-73f2-0310-859d-f6bbb57e9c96
no longer use idle priority, even if an actual implementation is still
missing
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21820 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
This does prevent the unwanted side effect of reading or writing at the current
file pointer position when the functions are called with a -1 position.
It's save to do this check in user space, because calling the _kern_* function
with -1 pos has the same effect as calling the normal read/write posix functions.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21701 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
they have been mapped. The previous method relied on their physical
pages living in the identity mapped region, which they wouldn't, when
the boot loader allocated enough memory before.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21610 a95241bf-73f2-0310-859d-f6bbb57e9c96
32 MB the kernel's VM initialization code would run into trouble.
Accessing freshly mapped memory in the generic page mapper would
result in a page fault. To be investigated.
* Apparently in the boot loader the file systems are responsible for
resolving symbolic links (instead of the VFS). We do that now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21608 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
* Prepared for other uses than just boot floppies (/CDs). We first try to
inflate the contents of the given device at offset 0 before using the
floppy disk offset. This will make it easy to mount tgz files loaded via
network or built into the boot loader itself.
* Increased the max possible size of inflated data to 32 MB.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21583 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
* $PATH is now set differently when booted in safe mode (just like LIBRARY_PATH,
and ADDON_PATH already were).
* This closes ticket #1103.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21406 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
* The previous symbol resolution code was incorrect. It would search all
loaded images in the order they had been loaded. Thus an add-on would
possibly see a symbol of an earlier loaded add-on. Now we search
recursively starting with the respective root image (executable or
add-on).
* Added BeOS style symbol resolution and made it the default. A symbol
undefined in an image is only searched in its direct dependencies.
Fixes bug #889 (BeOS apps crashing under Haiku when opening a file
panel).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21290 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
the terminating null byte as well. This fixes bug #1239.
* Using strlcpy() makes clearing the path buffer superfluous.
* Some more cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21239 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
This should fix the loader problem some folks were seeing on beos binaries.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20732 a95241bf-73f2-0310-859d-f6bbb57e9c96
The solution is less than optimal, but should work for now.
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a function pointer, which it isn't.
The mistake was probably made because there appears to be multiple stdio implementations
in the tree (BSD and glibc) so it's easy to look at the wrong code. Perhaps
we should clean that up.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20720 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
