mm: write_cache_pages terminate quickly

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Terminate the write_cache_pages loop upon encountering the first page past
end, without locking the page.  Pages cannot have their index change when
we have a reference on them (truncate, eg truncate_inode_pages_range
performs the same check without the page lock).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Dave Chinner <david@fromorbit.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 2009-01-06 14:39:11 -08:00 • committed by Linus Torvalds

parent 515f4a037f

commit d5482cdf8a

1 changed files with 16 additions and 16 deletions

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32

mm/page-writeback.c

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