Commit Graph

64 Commits

Author SHA1 Message Date
fredette c857df5775 When preparing to swap to a miniroot partition, add a little
padding to our estimate of the miniroot's size, to avoid
overwriting it.
2002-05-09 21:43:44 +00:00
manu 8645636b04 Updated comment to reflect the creation of uvm_swap_stats() 2002-04-01 12:24:11 +00:00
manu da6e8ccbe8 Don't allocate struct swapent when we only need a struct oswapent. 2002-03-26 11:50:26 +00:00
manu 2debbde786 Move swapctl(SWAP_STATS) implementation to a separate function called
uvm_swap_stats(). This is done in order to allow COMPAT_* swapctl()
emulation to use it directly without going through sys_swapctl().

The problem with using sys_swapctl() there is that it involves
copying the swapent array to the stackgap, and this array's size
is not known at build time. Hence it would not be possible to
 ensure it would fit in the stackgap in any case.
2002-03-18 11:43:01 +00:00
thorpej 1f6482dd1e Remove PR_MALLOCOK. 2002-03-09 07:28:20 +00:00
thorpej a180cee23b Pool deals fairly well with physical memory shortage, but it doesn't
deal with shortages of the VM maps where the backing pages are mapped
(usually kmem_map).  Try to deal with this:

* Group all information about the backend allocator for a pool in a
  separate structure.  The pool references this structure, rather than
  the individual fields.
* Change the pool_init() API accordingly, and adjust all callers.
* Link all pools using the same backend allocator on a list.
* The backend allocator is responsible for waiting for physical memory
  to become available, but will still fail if it cannot callocate KVA
  space for the pages.  If this happens, carefully drain all pools using
  the same backend allocator, so that some KVA space can be freed.
* Change pool_reclaim() to indicate if it actually succeeded in freeing
  some pages, and use that information to make draining easier and more
  efficient.
* Get rid of PR_URGENT.  There was only one use of it, and it could be
  dealt with by the caller.

From art@openbsd.org.
2002-03-08 20:48:27 +00:00
enami d3efa85632 G/C no longer used saved credential for file i/o. 2001-12-16 04:51:34 +00:00
lukem b616d1ca1d add RCSIDs, and in some cases, slightly cleanup #include order 2001-11-10 07:36:59 +00:00
chs 6e1dd2fa31 add an assert and rename some variables. 2001-11-06 05:44:25 +00:00
chs 550caf0ce3 allow SWAP_GETDUMPDEV for all users.
use {LIST,TAILQ}_FOREACH where appropriate.
2001-11-01 03:49:30 +00:00
chs 64c6d1d2dc a whole bunch of changes to improve performance and robustness under load:
- remove special treatment of pager_map mappings in pmaps.  this is
   required now, since I've removed the globals that expose the address range.
   pager_map now uses pmap_kenter_pa() instead of pmap_enter(), so there's
   no longer any need to special-case it.
 - eliminate struct uvm_vnode by moving its fields into struct vnode.
 - rewrite the pageout path.  the pager is now responsible for handling the
   high-level requests instead of only getting control after a bunch of work
   has already been done on its behalf.  this will allow us to UBCify LFS,
   which needs tighter control over its pages than other filesystems do.
   writing a page to disk no longer requires making it read-only, which
   allows us to write wired pages without causing all kinds of havoc.
 - use a new PG_PAGEOUT flag to indicate that a page should be freed
   on behalf of the pagedaemon when it's unlocked.  this flag is very similar
   to PG_RELEASED, but unlike PG_RELEASED, PG_PAGEOUT can be cleared if the
   pageout fails due to eg. an indirect-block buffer being locked.
   this allows us to remove the "version" field from struct vm_page,
   and together with shrinking "loan_count" from 32 bits to 16,
   struct vm_page is now 4 bytes smaller.
 - no longer use PG_RELEASED for swap-backed pages.  if the page is busy
   because it's being paged out, we can't release the swap slot to be
   reallocated until that write is complete, but unlike with vnodes we
   don't keep a count of in-progress writes so there's no good way to
   know when the write is done.  instead, when we need to free a busy
   swap-backed page, just sleep until we can get it busy ourselves.
 - implement a fast-path for extending writes which allows us to avoid
   zeroing new pages.  this substantially reduces cpu usage.
 - encapsulate the data used by the genfs code in a struct genfs_node,
   which must be the first element of the filesystem-specific vnode data
   for filesystems which use genfs_{get,put}pages().
 - eliminate many of the UVM pagerops, since they aren't needed anymore
   now that the pager "put" operation is a higher-level operation.
 - enhance the genfs code to allow NFS to use the genfs_{get,put}pages
   instead of a modified copy.
 - clean up struct vnode by removing all the fields that used to be used by
   the vfs_cluster.c code (which we don't use anymore with UBC).
 - remove kmem_object and mb_object since they were useless.
   instead of allocating pages to these objects, we now just allocate
   pages with no object.  such pages are mapped in the kernel until they
   are freed, so we can use the mapping to find the page to free it.
   this allows us to remove splvm() protection in several places.

The sum of all these changes improves write throughput on my
decstation 5000/200 to within 1% of the rate of NetBSD 1.5
and reduces the elapsed time for "make release" of a NetBSD 1.5
source tree on my 128MB pc to 10% less than a 1.5 kernel took.
2001-09-15 20:36:31 +00:00
chs a65671c2a9 don't mess with vnode holds or buffer lists for swap i/os.
fixes problems with leaked vnode holds.
2001-08-26 00:43:53 +00:00
chs 118ddca24a replace {simple_,}lock{_data,}_t with struct {simple,}lock {,*}. 2001-05-26 16:32:40 +00:00
chs 3845302904 remove trailing whitespace. 2001-05-25 04:06:11 +00:00
ross 91646d1aa5 Eliminate lhs cast (incorrectly accepted by gcc) 2001-05-15 09:04:00 +00:00
thorpej e2a791df22 Use pool_init() rather than pool_create(). 2001-05-09 23:20:59 +00:00
fvdl defa9bf05f Avoid potential cases of sleeping while holding a spinlock. Pay attention
to SWF_FAKE when finding a swap device. GC swapdrum_add; it was only
a few lines long and called once, so just inline the code there.
2001-05-09 19:21:02 +00:00
chs dd82ad8e2c eliminate the VM_PAGER_* error codes in favor of the traditional E* codes.
the mapping is:

VM_PAGER_OK		        0
VM_PAGER_BAD		        <unused>
VM_PAGER_FAIL		        <unused>
VM_PAGER_PEND		        0 (see below)
VM_PAGER_ERROR		        EIO
VM_PAGER_AGAIN		        EAGAIN
VM_PAGER_UNLOCK		        EBUSY
VM_PAGER_REFAULT	        ERESTART

for async i/o requests, it used to be possible for the request to
be convert to sync, and the pager would return VM_PAGER_OK or VM_PAGER_PEND
to indicate whether the caller should perform post-i/o cleanup.
this is no longer allowed; pagers must now return 0 to indicate that
the async i/o was successfully started, and the caller never needs to
worry about doing the post-i/o cleanup.
2001-03-10 22:46:45 +00:00
chs 19b7b64642 clean up DIAGNOSTIC checks, use KASSERT(). 2001-02-18 21:19:08 +00:00
pk dca7b5b472 SWAP_DUMPDEV,SWAP_OFF cases: make sure to release the vnode being operated on. 2001-02-12 11:50:50 +00:00
enami f306f72978 Use cast where appropriate to avoid integer overflow. 2001-01-04 06:07:18 +00:00
chs 89b005fc27 when we fail to allocate anons to represent new swap space,
just return an error rather than panicing.
2000-12-27 09:17:04 +00:00
enami 6ff137de16 Place a name of extent in a struct swapdev instead of dynamically
allocating it.
2000-12-23 12:13:05 +00:00
chs aeda8d3b77 Initial integration of the Unified Buffer Cache project. 2000-11-27 08:39:39 +00:00
mrg 45d83e5996 add SWAP_GETDUMPDEV command support. 2000-11-17 11:39:39 +00:00
chs 1fd1a318cb in swap_off(), reverse the order of vrele() and VOP_CLOSE() so that
devices will actually be notified if this is the last close.
this allows raidframe swap devices to be marked clean.
also, move the corresponding vref() into swap_on() for symmetry
and improve some comments.
2000-11-13 14:50:55 +00:00
mrg dea44a9ec4 remove include of <vm/vm.h> 2000-06-27 17:29:17 +00:00
thorpej 655b21e17d Tell uvm_pagermapin() the direction of the I/O so that it can map
with only the protection that it needs.
2000-05-19 03:45:04 +00:00
mrg 6b7f13609a remove <vm/vm_swap.h> and <vm/vm_conf.h> 2000-04-15 18:08:12 +00:00
chs d75d6fb164 restore a brelvp() that I removed in a moment of overzealousness.
Debugged by:  Brian Grayson <bgrayson@netbsd.org>
2000-04-07 08:27:28 +00:00
thorpej fe551f0e64 Fix a bug in disksort_*() which caused non-optimal ordering when multiple
active partitions were on a single spindle.  Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.
2000-02-07 20:16:47 +00:00
thorpej 0b0aecffd6 Update for sys/buf.h/disksort_*() changes. 2000-01-21 23:43:10 +00:00
chs 16f0ca3612 add support for ``swapctl -d'' (removing swap space).
improve handling of i/o errors in swap space.

reviewed by:  Chuck Cranor
2000-01-11 06:57:49 +00:00
wrstuden 56f2ef9f29 Revert rev 1.28 -> 1.29. The VOP_CLOSE call was happeneing with the vnode
already locked, so don't lock it here.
2000-01-04 21:37:54 +00:00
fvdl 0b1963121a Add Kirk McKusick's soft updates code to the trunk. Not enabled by
default, as the copyright on the main file (ffs_softdep.c) is such
that is has been put into gnusrc. options SOFTDEP will pull this
in. This code also contains the trickle syncer.

Bump version number to 1.4O
1999-11-15 18:49:07 +00:00
wrstuden e682a080e9 In spec_close(), if we're not doing a non-blocking close and VXLOCK is
not set, unlock the vnode before calling the device's close routine and
relock it after it returns. tty close routines will sleep waiting for
buffers to drain, which won't happen often times as the other side needs
to grab the vnode lock first.

Make all unmount routines lock the device vnode before calling VOP_CLOSE().
1999-10-16 23:53:26 +00:00
thorpej 3f176180d5 Garbage collect thread_sleep()/thread_wakeup() left over from the old
Mach VM code.  Also nuke iprintf(), which was no longer used anywhere.

Add proclist locking where appropriate.
1999-07-22 22:58:38 +00:00
chs 039c17eca9 remove some old #if 0'd-out debugging code. 1999-03-30 16:07:47 +00:00
chs d97d75d81b add uvmexp.swpgonly and use it to detect out-of-swap conditions. 1999-03-26 17:34:15 +00:00
chs a65cf876d6 VHOLD() must be called at splbio() since HOLDRELE() is called
from the iodone handler.
1999-03-18 01:45:29 +00:00
mrg 3743c9e91d handle SWAP_DUMPDEV 1999-02-23 15:58:28 +00:00
marc e21b4568e2 When a reference is made to a hole in a swap file, panic. The optimal
thing would be to allocate the block, but I don't know how to do this.
The panic is preferable to the random memory corruption the old code
was causing.
1998-12-26 06:25:59 +00:00
mycroft 7c037b7009 Clear B_NOCACHE when we're done with the buffer -- although this is probably
pointless.
1998-11-08 19:41:49 +00:00
mycroft 6422baa1c0 Set the B_NOCACHE bit so that NFSv3 will not try to do async writes. 1998-11-08 19:37:12 +00:00
chs 549cd579e5 shift by PAGE_SHIFT instead of multiplying or dividing by PAGE_SIZE. 1998-10-18 23:49:59 +00:00
pk d2d3f83fd7 Panic instead failing the syscall on an impossible condition (from Robert Elz).
Plug possible memory leakage with the recently added device path stuff.
1998-09-06 23:09:39 +00:00
enami 71ba20edbb Define `len' as size_t rather than int so that correct type is passed
as fourth argument of copystr.
1998-08-30 03:08:43 +00:00
mrg edda33e00c move <vm/vm_swap.h> to <sys/swap.h>. <vm/vm_swap.h> still works for now (goes away later) 1998-08-29 17:01:14 +00:00
mrg b5f69ff667 add a `char se_path[PATH_MAX]' member to struct swapent, that
the pathname of the swap device is saved into.  add a char *swd_path
member to struct swapdev, that contains a copy of the pathname
(using malloc(9)).  rename swapctl(2)'s SWAP_STATS to SWAP_OSTATS,
and add a new SWAP_STATS command (number).  make swapctl(SWAP_STATS,
...) [new version] copy the path out.  if COMPAT_13, also include
support for SWAP_OSTATS.  also fix a minor bug in swapctl(2).

the point of this is that swapfiles are now shown in `swapctl -l'.
1998-08-29 13:27:50 +00:00
eeh a2dd74ed79 Merge paddr_t changes into the main branch. 1998-08-13 02:10:37 +00:00