Commit 1d4a788f authored Mar 28, 2008 by YAMAMOTO Takashi Committed by Linus Torvalds Mar 28, 2008

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>

parent 8c703d35

kernel/fork.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -394,7 +394,6 @@ void __mmdrop(struct mm_struct *mm)
		{
		BUG_ON(mm == &init_mm);
		mm_free_pgd(mm);
		mm_free_cgroup(mm);
		destroy_context(mm);
		free_mm(mm);
		}
		@@ -416,6 +415,7 @@ void mmput(struct mm_struct *mm)
		spin_unlock(&mmlist_lock);
		}
		put_swap_token(mm);
		mm_free_cgroup(mm);
		mmdrop(mm);
		}
		}