On Fri, 2017-03-24 at 20:36 +0800, Ming Lei wrote:
> + /* block new I/O coming */
> + blk_freeze_queue_start(q);
As I have already mentioned two times, the comment above
blk_freeze_queue_start() should be made more clear. It should mention that
without that call blk_queue_enter() won't
Before commit 780db2071a(blk-mq: decouble blk-mq freezing
from generic bypassing), the dying flag is checked before
entering queue, and Tejun converts the checking into .mq_freeze_depth,
and assumes the counter is increased just after dying flag
is set. Unfortunately we doesn't do that in
