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author | Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> | 2009-12-15 16:47:11 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:07 -0800 |
commit | 57f9fd7d25ac9a0d7e3a4ced580e780ab4524e3b (patch) | |
tree | ff95e62e7326ba7e77903f7f767e9650c0d9b3dd /mm/oom_kill.c | |
parent | a3032a2c15c6967f9f0c0c28375b1a5c833a3112 (diff) |
memcg: cleanup mem_cgroup_move_parent()
mem_cgroup_move_parent() calls try_charge first and cancel_charge on
failure. IMHO, charge/uncharge(especially charge) is high cost operation,
so we should avoid it as far as possible.
This patch tries to delay try_charge in mem_cgroup_move_parent() by
re-ordering checks it does.
And this patch renames mem_cgroup_move_account() to
__mem_cgroup_move_account(), changes the return value of
__mem_cgroup_move_account() from int to void, and adds a new
wrapper(mem_cgroup_move_account()), which checks whether a @pc is valid
for moving account and calls __mem_cgroup_move_account().
This patch removes the last caller of trylock_page_cgroup(), so removes
its definition too.
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/oom_kill.c')
0 files changed, 0 insertions, 0 deletions