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Linus Torvalds 3d80636a0d Fix memory ordering bug in page reclaim 
As noticed by Nick Piggin, we need to make sure that we check the page
count before we check for PageDirty, since the dirty check is only valid
if the count implies that we're the only possible ones holding the page.

We always did do this, but the code needs a read-memory-barrier to make
sure that the orderign is also honored by the CPU.

(The writer side is ordered due to the atomic decrement and test on the
page count, see the discussion on linux-kernel)

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2005-10-16 17:36:06 -07:00
..
Kconfig [PATCH] fix mm/Kconfig spelling 2005-09-17 11:50:01 -07:00
Makefile [PATCH] xip: fs/mm: execute in place 2005-06-24 00:06:41 -07:00
bootmem.c Revert "x86-64: Reverse order of bootmem lists" 2005-09-30 12:38:27 -07:00
fadvise.c [PATCH] xip: madvice/fadvice: execute in place 2005-06-24 00:06:42 -07:00
filemap.c [PATCH] mm/filemap.c: make two functions static 2005-09-10 10:06:25 -07:00
filemap.h [PATCH] xip: reduce code duplication 2005-06-24 00:06:41 -07:00
filemap_xip.c [PATCH] execute-in-place fixes 2005-07-15 09:54:50 -07:00
fremap.c [PATCH] Don't map the same page too much 2005-10-11 12:03:47 -07:00
highmem.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
hugetlb.c [PATCH] hugetlb: move stale pte check into huge_pte_alloc() 2005-09-05 00:05:46 -07:00
internal.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
madvise.c [PATCH] madvise: Avoid returning error code -EBADF for anonymous mappings 2005-10-11 09:46:54 -07:00
memory.c [PATCH] mm/filemap.c: make two functions static 2005-09-10 10:06:25 -07:00
mempolicy.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
mempool.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
mincore.c [PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR 2005-04-19 13:29:20 -07:00
mlock.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmap.c [PATCH] fix locking comment in unmap_region() 2005-09-21 10:11:55 -07:00
mprotect.c [PATCH] mm: add a note about partially hardcoded VM_* flags 2005-09-21 10:11:55 -07:00
mremap.c [PATCH] mm: move_pte to remap ZERO_PAGE 2005-09-28 07:46:40 -07:00
msync.c [PATCH] msync: check pte dirty earlier 2005-06-21 18:46:21 -07:00
nommu.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
oom_kill.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
page-writeback.c [PATCH] timer initialization cleanup: DEFINE_TIMER 2005-09-09 14:03:48 -07:00
page_alloc.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
page_io.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
pdflush.c [PATCH] Cleanup patch for process freezing 2005-06-25 17:10:13 -07:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
readahead.c [PATCH] readahead: reset cache_hit earlier 2005-09-07 16:57:25 -07:00
rmap.c [PATCH] mm: cleanup rmap 2005-09-05 00:05:43 -07:00
shmem.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
slab.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
sparse.c [PATCH] sparsemem extreme: hotplug preparation 2005-09-05 00:05:38 -07:00
swap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
swap_state.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
swapfile.c [PATCH] Fix bd_claim() error code. 2005-09-22 22:17:37 -07:00
thrash.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tiny-shmem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
truncate.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
vmalloc.c [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
vmscan.c Fix memory ordering bug in page reclaim 2005-10-16 17:36:06 -07:00