mm: more rmap checking

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Re-introduce rmap verification patches that Hugh removed when he removed
PG_map_lock. PG_map_lock actually isn't needed to synchronise access to
anonymous pages, because PG_locked and PTL together already do.

These checks were important in discovering and fixing a rare rmap corruption
in SLES9.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

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Nick Piggin 2007-05-16 22:11:21 -07:00 • committed by Linus Torvalds

parent ea125892a1

commit c97a9e10ea

3 changed files with 62 additions and 11 deletions

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13

include/linux/rmap.h

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