diff options
| author | KAMEZAWA Hiroyuki <[email protected]> | 2012-03-21 16:34:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-03-21 17:55:01 -0700 |
| commit | 312734c04e2fecc58429aec98194e4ff12d8f7d6 (patch) | |
| tree | c1195cd46733b6a3909c11b2b5abcdee4412b99b /net/lapb/lapb_subr.c | |
| parent | 619d094b5872a5af153f1af77a8b7f7326faf0d0 (diff) | |
memcg: remove PCG_MOVE_LOCK flag from page_cgroup
PCG_MOVE_LOCK is used for bit spinlock to avoid race between overwriting
pc->mem_cgroup and page statistics accounting per memcg. This lock helps
to avoid the race but the race is very rare because moving tasks between
cgroup is not a usual job. So, it seems using 1bit per page is too
costly.
This patch changes this lock as per-memcg spinlock and removes
PCG_MOVE_LOCK.
If smaller lock is required, we'll be able to add some hashes but I'd like
to start from this.
Signed-off-by: KAMEZAWA Hiroyuki <[email protected]>
Acked-by: Greg Thelen <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Ying Han <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions