Nick Piggin 676165a8af [PATCH] Fix buddy list race that could lead to page lru list corruptions ...

Rohit found an obscure bug causing buddy list corruption.

page_is_buddy is using a non-atomic test (PagePrivate && page_count == 0)
to determine whether or not a free page's buddy is itself free and in the
buddy lists.

Each of the conjuncts may be true at different times due to unrelated
conditions, so the non-atomic page_is_buddy test may find each conjunct to
be true even if they were not both true at the same time (ie. the page was
not on the buddy lists).

Signed-off-by: Martin Bligh <mbligh@google.com>
Signed-off-by: Rohit Seth <rohitseth@google.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-04-10 10:16:37 -07:00

..

bootmem.c

[PATCH] x86_64: Handle empty PXMs that only contain hotplug memory

2006-04-09 11:53:16 -07:00

fadvise.c

[PATCH] sys_sync_file_range()

2006-03-31 12:18:54 -08:00

filemap_xip.c

[PATCH] replace inode_update_time with file_update_time

2006-01-10 08:01:30 -08:00

filemap.c

[PATCH] fadvise(): write commands

2006-03-24 07:33:25 -08:00

filemap.h

[PATCH] xip: reduce code duplication

2005-06-24 00:06:41 -07:00

fremap.c

VM: add common helper function to create the page tables

2005-11-29 14:03:14 -08:00

highmem.c

BUG_ON() Conversion in mm/highmem.c

2006-04-02 13:47:35 +02:00

hugetlb.c

[PATCH] hugetlb: don't allow free hugetlb count fall below reserved count

2006-03-31 12:18:50 -08:00

internal.h

[PATCH] remove set_page_count() outside mm/

2006-03-22 07:54:02 -08:00

Kconfig

[PATCH] mm: make page migration dependent on swap and NUMA

2006-03-25 08:22:50 -08:00

madvise.c

[PATCH] madvise MADV_DONTFORK/MADV_DOFORK

2006-02-14 16:09:34 -08:00

Makefile

[PATCH] uninline zone helpers

2006-03-27 08:44:48 -08:00

memory_hotplug.c

[PATCH] memory hotadd: pgdat->node_present_pages fix

2006-03-09 19:47:38 -08:00

memory.c

[PATCH] Don't pass boot parameters to argv_init[]

2006-03-31 12:18:53 -08:00

mempolicy.c

[PATCH] Typo fixes

2006-03-28 09:16:08 -08:00

mempool.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

2006-03-26 09:41:18 -08:00

migrate.c

[PATCH] page migration reorg

2006-03-22 07:54:06 -08:00

mincore.c

[PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR

2005-04-19 13:29:20 -07:00

mlock.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

mmap.c

BUG_ON() Conversion in mm/mmap.c

2006-04-01 01:23:29 +02:00

mmzone.c

[PATCH] uninline zone helpers

2006-03-27 08:44:48 -08:00

mprotect.c

[PATCH] Enable mprotect on huge pages

2006-03-22 07:54:03 -08:00

mremap.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

msync.c

The comment describing how MS_ASYNC works in msync.c is confusing

2006-03-24 18:30:53 +01:00

nommu.c

[PATCH] mm: nommu use compound pages

2006-03-22 07:54:01 -08:00

oom_kill.c

[PATCH] out_of_memory() locking fix

2006-03-02 08:33:07 -08:00

page_alloc.c

[PATCH] Fix buddy list race that could lead to page lru list corruptions

2006-04-10 10:16:37 -07:00

page_io.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

page-writeback.c

Documentation: fix minor kernel-doc warnings

2006-04-02 13:59:55 +02:00

pdflush.c

[PATCH] Swap Migration V5: PF_SWAPWRITE to allow writing to swap

2006-01-08 20:12:41 -08:00

prio_tree.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

readahead.c

[PATCH] ext3_readdir: use generic readahead

2006-03-23 07:38:09 -08:00

rmap.c

[PATCH] mm: more CONFIG_DEBUG_VM

2006-03-22 07:54:02 -08:00

shmem.c

[PATCH] shmem: inline to avoid warning

2006-03-22 07:54:02 -08:00

slab.c

BUG_ON() Conversion in mm/slab.c

2006-04-02 13:49:25 +02:00

slob.c

[PATCH] slab: introduce kmem_cache_zalloc allocator

2006-03-25 08:22:49 -08:00

sparse.c

[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros

2006-01-08 20:13:38 -08:00

swap_state.c

BUG_ON() Conversion in mm/swap_state.c

2006-04-01 01:25:12 +02:00

swap.c

[PATCH] for_each_possible_cpu: fixes for generic part

2006-03-28 09:16:05 -08:00

swapfile.c

[PATCH] mm: schedule find_trylock_page() removal

2006-03-31 12:18:49 -08:00

thrash.c

[PATCH] temporarily disable swap token on memory pressure

2005-11-28 14:42:25 -08:00

tiny-shmem.c

[PATCH] do_truncate() call fix in tiny-shmem.c

2006-01-12 09:08:49 -08:00

truncate.c

[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

2006-01-09 15:59:24 -08:00

util.c

[PATCH] slab: optimize constant-size kzalloc calls

2006-03-25 08:22:49 -08:00

vmalloc.c

BUG_ON() Conversion in mm/vmalloc.c

2006-04-01 01:26:09 +02:00

vmscan.c

[PATCH] for_each_online_pgdat: renaming for_each_pgdat

2006-03-27 08:44:48 -08:00