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SubjectRe: [PATCH] blk-cgroup: Call cgroup_path only under cgroup lock
On Mon, Mar 12, 2012 at 8:04 PM, Tejun Heo <> wrote:
> Hello, Sasha.
> On Mon, Mar 12, 2012 at 04:01:18PM -0400, Sasha Levin wrote:
>> Since we can't keep rcu read lock during blkg_alloc(), we currently
>> call cgroup_path() without any locks at all.
>> This patch adds cgroup locking before calling cgroup_path.
>> This also fixes a lockdep warning on boot.
>> Signed-off-by: Sasha Levin <>
> Which branch is this against?  There's already pending stat update
> patch from Vivek which fix this problem along with the percpu
> allocation problem.
> Thanks.

I've fixed it for linux-next.
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