On Thu, Sep 06, 2018 at 05:10:44PM -0400, Dennis Zhou wrote:

From: "Dennis Zhou (Facebook)" <redacted>

Now that every bio is associated with a blkg, this puts the use of
blkg_get, blkg_try_get, and blkg_put on the hot path. This switches over
the refcnt in blkg to use percpu_ref.

Signed-off-by: Dennis Zhou <redacted>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun