hi,
the following patch is to fix spurious EBUSY on cgroup removal.
YAMAMOTO Takashi
call mm_free_cgroup earlier.
otherwise a reference due to lazy mm switching can prevent cgroup removal.
Signed-off-by: YAMAMOTO Takashi <yamamoto@xxxxxxxxxxxxx>
---
--- linux-2.6.24-rc8-mm1/kernel/fork.c.BACKUP 2008-01-23 14:43:29.000000000 +0900
+++ linux-2.6.24-rc8-mm1/kernel/fork.c 2008-01-31 17:26:31.000000000 +0900
@@ -393,7 +393,6 @@ 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);
}
@@ -415,6 +414,7 @@ void mmput(struct mm_struct *mm)
spin_unlock(&mmlist_lock);
}
put_swap_token(mm);
+ mm_free_cgroup(mm);
mmdrop(mm);
}
}
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