On Tue, Jun 24, 2014 at 12:01:22PM +0800, Jet Chen wrote:
we noticed the below changes on
commit c924ec35e72ce0d6c289b858d323f7eb3f5076a5 ("block, blk-mq: draining can't
be skipped even if bypass_depth was non-zero")
Yeah, this is from trying to drain NULL root blkcg. It's hit from
another path too and will soon be fixed.