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memcgroup: fix spurious EBUSY on memory cgroup removal 

Call mm_free_cgroup earlier.  Otherwise a reference due to lazy mm switching
can prevent cgroup removal.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.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>
This commit is contained in:
YAMAMOTO Takashi 2008-03-28 14:15:50 -07:00 committed by Linus Torvalds
parent 8c703d35fa
commit 1d4a788f15
1 changed files with 1 additions and 1 deletions
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2
kernel/fork.c
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@ -394,7 +394,6 @@ void __mmdrop(struct mm_struct *mm)
{ {
BUG_ON(mm == &init_mm); BUG_ON(mm == &init_mm);
mm_free_pgd(mm); mm_free_pgd(mm);
mm_free_cgroup(mm);
destroy_context(mm); destroy_context(mm);
free_mm(mm); free_mm(mm);
} }
@ -416,6 +415,7 @@ void mmput(struct mm_struct *mm)
spin_unlock(&mmlist_lock); spin_unlock(&mmlist_lock);
} }
put_swap_token(mm); put_swap_token(mm);
mm_free_cgroup(mm);
mmdrop(mm); mmdrop(mm);
} }
} }