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| author | KOSAKI Motohiro | 2010-03-05 22:41:55 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2010-03-06 20:26:25 +0100 |
| commit | 93e4a89a8c987189b168a530a331ef6d0fcf07a7 (patch) | |
| tree | deb08017c0e4874539549d3ea9bf2d7b447a43be /mm/mempolicy.c | |
| parent | mm: remove free_hot_page() (diff) | |
| download | kernel-qcow2-linux-93e4a89a8c987189b168a530a331ef6d0fcf07a7.tar.gz kernel-qcow2-linux-93e4a89a8c987189b168a530a331ef6d0fcf07a7.tar.xz kernel-qcow2-linux-93e4a89a8c987189b168a530a331ef6d0fcf07a7.zip | |
mm: restore zone->all_unreclaimable to independence word
commit e815af95 ("change all_unreclaimable zone member to flags") changed
all_unreclaimable member to bit flag. But it had an undesireble side
effect. free_one_page() is one of most hot path in linux kernel and
increasing atomic ops in it can reduce kernel performance a bit.
Thus, this patch revert such commit partially. at least
all_unreclaimable shouldn't share memory word with other zone flags.
[akpm@linux-foundation.org: fix patch interaction]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
0 files changed, 0 insertions, 0 deletions