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(parent: 9978ad5) | patch
mm: pagecache insertion fewer atomics
authorNick Piggin <npiggin@suse.de>
Sun, 19 Oct 2008 03:26:57 +0000 (20:26 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 20 Oct 2008 15:52:31 +0000 (08:52 -0700)
commitf45840b5c128445da70e7ec33adc47b4a12bdaf4
tree3815a03d12d1c69d71a48c44cd216c3e1e84272atree | snapshot
parent9978ad583e100945b74e4f33e73317983ea32df9commit | diff
mm: pagecache insertion fewer atomics

Setting and clearing the page locked when inserting it into swapcache /
pagecache when it has no other references can use non-atomic page flags
operations because no other CPU may be operating on it at this time.

This saves one atomic operation when inserting a page into pagecache.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/pagemap.h diff | blob | history
mm/swap_state.c diff | blob | history
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