Nick Piggin 2b53303840 [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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2006-04-17 13:16:05 -07:00

..

bootmem.c

[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm

2006-01-06 08:33:26 -08:00

fadvise.c

[PATCH] fadvise: return ESPIPE on FIFO/pipe

2006-01-08 20:14:00 -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] mm: migration page refcounting fix

2006-01-18 19:20:17 -08:00

filemap.h

…

fremap.c

VM: add common helper function to create the page tables

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

highmem.c

[PATCH] gfp_t: the rest

2005-10-28 08:16:51 -07:00

hugetlb.c

[PATCH] compound page: use page[1].lru

2006-02-14 16:09:33 -08:00

internal.h

[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm

2006-01-06 08:33:26 -08:00

Kconfig

[PATCH] Swap Migration V5: Add CONFIG_MIGRATION for page migration support

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

madvise.c

[PATCH] madvise MADV_DONTFORK/MADV_DOFORK

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

Makefile

[PATCH] slob: introduce the SLOB allocator

2006-01-08 20:13:41 -08:00

memory_hotplug.c

[PATCH] memory hotadd: pgdat->node_present_pages fix

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

memory.c

[PATCH] fix free swap cache latency

2006-03-17 07:51:26 -08:00

mempolicy.c

[PATCH] page migration: Fail with error if swap not setup

2006-03-17 07:51:25 -08:00

mempool.c

…

mincore.c

…

mlock.c

[PATCH] move capable() to capability.h

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

mmap.c

[PATCH] move capable() to capability.h

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

mprotect.c

[PATCH] unpaged: private write VM_RESERVED

2005-11-22 09:13:42 -08:00

mremap.c

[PATCH] move capable() to capability.h

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

msync.c

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

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

nommu.c

[PATCH] nommu: implement vmalloc_node()

2006-02-28 20:53:44 -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

2006-04-17 13:16:05 -07:00

page_io.c

[PATCH] mm: split page table lock

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

page-writeback.c

[PATCH] mm: dirty_exceeded speedup

2006-01-18 19:20:17 -08:00

pdflush.c

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

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

prio_tree.c

…

readahead.c

[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE

2006-01-03 11:45:42 -08:00

rmap.c

[PATCH] page_add_file_rmap(): remove BUG_ON()s

2006-03-09 19:47:36 -08:00

shmem.c

[PATCH] tmpfs: fix mount mpol nodelist parsing

2006-02-21 17:10:15 -08:00

slab.c

[PATCH] slab: Node rotor for freeing alien caches and remote per cpu pages.

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

slob.c

[PATCH] SLOB=y && SMP=y fix

2006-02-08 07:52:58 -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

[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method

2006-02-01 08:53:17 -08:00

swap.c

[PATCH] fix race in pagevec_strip?

2006-03-17 07:51:25 -08:00

swapfile.c

[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes

2006-02-01 08:53:16 -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] slob: introduce mm/util.c for shared functions

2006-01-08 20:13:41 -08:00

vmalloc.c

[PATCH] kernel-doc: fix warnings in vmalloc.c

2005-11-07 07:53:56 -08:00

vmscan.c

[PATCH] page migration: fail if page is in a vma flagged VM_LOCKED

2006-03-14 21:43:02 -08:00