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| author | Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> | 2009-01-29 23:25:11 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-30 03:04:43 +0100 |
| commit | 7bcc1bb1232de6efc0b85e0c7fe38e90b2436318 (patch) | |
| tree | 3952a706885f4c57217f4196f055a7c16d0af80b /drivers/gpio | |
| parent | cgroups: use hierarchy mutex in creation failure path (diff) | |
| download | linux-7bcc1bb1232de6efc0b85e0c7fe38e90b2436318.tar.xz linux-7bcc1bb1232de6efc0b85e0c7fe38e90b2436318.zip | |
memcg: get/put parents at create/free
The lifetime of struct cgroup and struct mem_cgroup is different and
mem_cgroup has its own reference count for handling references from
swap_cgroup.
This causes strange problem that the parent mem_cgroup dies while child
mem_cgroup alive, and this problem causes a bug in case of
use_hierarchy==1 because res_counter_uncharge climbs up the tree.
This patch is for avoiding it by getting the parent at create, and putting
it at freeing.
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Reviewed-by; KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions