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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2011-01-20 17:44:24 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-20 20:02:06 -0500
commitca3e021417eed30ec2b64ce88eb0acf64aa9bc29 (patch)
tree710590e51764d56c12d00744c402ab15c0d14a6b /net/irda
parente401f1761c0b01966e36e41e2c385d455a7b44ee (diff)
memcg: fix USED bit handling at uncharge in THP
Now, under THP: at charge: - PageCgroupUsed bit is set to all page_cgroup on a hugepage. ....set to 512 pages. at uncharge - PageCgroupUsed bit is unset on the head page. So, some pages will remain with "Used" bit. This patch fixes that Used bit is set only to the head page. Used bits for tail pages will be set at splitting if necessary. This patch adds this lock order: compound_lock() -> page_cgroup_move_lock(). [akpm@linux-foundation.org: fix warning] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/irda')
0 files changed, 0 insertions, 0 deletions