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memcg: remove redundant check in move_task() 

It's guaranteed by cgroup that old_cgrp != cgrp.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Li Zefan 2008-07-29 22:33:20 -07:00 committed by Linus Torvalds
parent 55b6fd0162
commit 4ef1b0fd61
1 changed files with 0 additions and 3 deletions
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3
mm/memcontrol.c
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@ -1168,9 +1168,6 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss,
mem = mem_cgroup_from_cont(cont);
old_mem = mem_cgroup_from_cont(old_cont);
if (mem == old_mem)
goto out;
/*
* Only thread group leaders are allowed to migrate, the mm_struct is
* in effect owned by the leader