linux/mm
David Rientjes ff0ceb9deb oom: serialize out of memory calls
A final allocation attempt with a very high watermark needs to be attempted
before invoking out_of_memory().  OOM killer serialization needs to occur
before this final attempt, otherwise tasks attempting to OOM-lock all zones in
its zonelist may spin and acquire the lock unnecessarily after the OOM
condition has already been alleviated.

If the final allocation does succeed, the zonelist is simply OOM-unlocked and
__alloc_pages() returns the page.  Otherwise, the OOM killer is invoked.

If the task cannot acquire OOM-locks on all zones in its zonelist, it is put
to sleep and the allocation is retried when it gets rescheduled.  One of its
zones is already marked as being in the OOM killer so it'll hopefully be
getting some free memory soon, at least enough to satisfy a high watermark
allocation attempt.  This prevents needlessly killing a task when the OOM
condition would have already been alleviated if it had simply been given
enough time.

Cc: Andrea Arcangeli <andrea@suse.de>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:45 -07:00
..
allocpercpu.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
backing-dev.c mm: per device dirty threshold 2007-10-17 08:42:45 -07:00
bootmem.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
bounce.c block: Initial support for data-less (or empty) barrier support 2007-10-16 11:03:56 +02:00
fadvise.c [PATCH] mm: change uses of f_{dentry,vfsmnt} to use f_path 2006-12-08 08:28:43 -08:00
filemap_xip.c mm: write iovec cleanup 2007-10-16 09:42:54 -07:00
filemap.c fs: remove some AOP_TRUNCATED_PAGE 2007-10-16 09:42:58 -07:00
fremap.c fix VM_CAN_NONLINEAR check in sys_remap_file_pages 2007-10-08 12:58:14 -07:00
highmem.c Create the ZONE_MOVABLE zone 2007-07-17 10:22:59 -07:00
hugetlb.c hugetlb: fix dynamic pool resize failure case 2007-10-16 09:43:03 -07:00
internal.h Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator 2007-10-16 09:43:01 -07:00
Kconfig memory unplug: page offline 2007-10-16 09:43:02 -07:00
madvise.c speed up madvise_need_mmap_write() usage 2007-07-16 09:05:36 -07:00
Makefile memory unplug: page isolation 2007-10-16 09:43:02 -07:00
memory_hotplug.c fix memory hot remove not configured case. 2007-10-16 09:43:02 -07:00
memory.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mempolicy.c mm/mempolicy.c: cleanups 2007-10-16 09:43:03 -07:00
mempool.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
migrate.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mincore.c [PATCH] mincore: vma crossing fix 2007-02-15 09:57:03 -08:00
mlock.c do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY 2007-07-16 09:05:37 -07:00
mmap.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
mmzone.c [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols 2006-12-07 08:39:44 -08:00
mprotect.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mremap.c mm: variable length argument support 2007-07-19 10:04:45 -07:00
msync.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
nommu.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
oom_kill.c oom: add per-zone locking 2007-10-17 08:42:45 -07:00
page_alloc.c oom: serialize out of memory calls 2007-10-17 08:42:45 -07:00
page_io.c Drop 'size' argument from bio_endio and bi_end_io 2007-10-10 09:25:57 +02:00
page_isolation.c memory unplug: page isolation 2007-10-16 09:43:02 -07:00
page-writeback.c mm: dirty balancing for tasks 2007-10-17 08:42:45 -07:00
pdflush.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
quicklist.c Quicklists for page table pages 2007-05-07 12:12:54 -07:00
readahead.c mm: bdi init hooks 2007-10-17 08:42:45 -07:00
rmap.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
shmem_acl.c [PATCH] Fix typos in mm/shmem_acl.c 2006-10-11 11:14:23 -07:00
shmem.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
slab.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
slob.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
slub.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
sparse-vmemmap.c memory hotplug: Hot-add with sparsemem-vmemmap 2007-10-16 09:43:02 -07:00
sparse.c memory hotplug: Hot-add with sparsemem-vmemmap 2007-10-16 09:43:02 -07:00
swap_state.c mm: clarify __add_to_swap_cache locking 2007-10-16 09:42:53 -07:00
swap.c mm: bdi init hooks 2007-10-17 08:42:45 -07:00
swapfile.c Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
thrash.c Bug in mm/thrash.c function grab_swap_token() 2007-05-11 08:29:32 -07:00
tiny-shmem.c [PATCH] mm/{,tiny-}shmem.c cleanups 2007-03-01 14:53:35 -08:00
truncate.c mm: count reclaimable pages per BDI 2007-10-17 08:42:45 -07:00
util.c Slab allocators: fail if ksize is called with a NULL parameter 2007-10-16 09:42:53 -07:00
vmalloc.c Categorize GFP flags 2007-10-16 09:42:59 -07:00
vmscan.c oom: change all_unreclaimable zone member to flags 2007-10-17 08:42:45 -07:00
vmstat.c oom: change all_unreclaimable zone member to flags 2007-10-17 08:42:45 -07:00