diff options
author | Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> | 2010-03-10 15:22:18 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:36 -0800 |
commit | 483c30b514bd3037fa3f19fa42327c94c10f51c8 (patch) | |
tree | aaf96db52bf4bdb0c83f209bc9c6a1237867718f /fs/btrfs/print-tree.c | |
parent | 024914477e15ef8b17f271ec47f1bb8a589f0806 (diff) |
memcg: improve performance in moving swap charge
Try to reduce overheads in moving swap charge by:
- Adds a new function(__mem_cgroup_put), which takes "count" as a arg and
decrement mem->refcnt by "count".
- Removed res_counter_uncharge, css_put, and mem_cgroup_put from the path
of moving swap account, and consolidate all of them into mem_cgroup_clear_mc.
We cannot do that about mc.to->refcnt.
These changes reduces the overhead from 1.35sec to 0.9sec to move charges
of 1G anonymous memory(including 500MB swap) in my test environment.
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/btrfs/print-tree.c')
0 files changed, 0 insertions, 0 deletions