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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>		19 years ago
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Kconfig	…
Makefile	…
bootmem.c	…
fadvise.c	…
filemap.c	…
filemap.h	…
filemap_xip.c	…
fremap.c	…
highmem.c	…
hugetlb.c	…
internal.h	…
madvise.c	…
memory.c	…
mempolicy.c	…
mempool.c	…
mincore.c	…
mlock.c	…
mmap.c	…
mprotect.c	…
mremap.c	…
msync.c	…
nommu.c	…
oom_kill.c	…
page-writeback.c	…
page_alloc.c	…
page_io.c	…
pdflush.c	…
prio_tree.c	…
readahead.c	…
rmap.c	…
shmem.c	…
slab.c	…
sparse.c	…
swap.c	…
swap_state.c	…
swapfile.c	…
thrash.c	…
tiny-shmem.c	…
truncate.c	…
vmalloc.c	…
vmscan.c	Fix memory ordering bug in page reclaim	19 years ago