| commit | f45840b5c128445da70e7ec33adc47b4a12bdaf4 | |
| author | Nick Piggin <npiggin@suse.de> | |
| Sun, 19 Oct 2008 03:26:57 +0000 (18 20:26 -0700) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Mon, 20 Oct 2008 15:52:31 +0000 (20 08:52 -0700) | ||
| tree | 3815a03d12d1c69d71a48c44cd216c3e1e84272a | treesnapshot (tar.gz zip) |
| parent | 9978ad583e100945b74e4f33e73317983ea32df9 | commitdiff |
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>
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 | diffblobblamehistory | |
| mm/swap_state.c | diffblobblamehistory |