Re: [PATCH 0/4] blk-mq: support to use hw tag for scheduling

On Wed, 2017-05-03 at 11:40 -0600, Jens Axboe wrote:

Subject: [PATCH] blk-mq: don't use sync workqueue flushing from drivers
=20
A previous commit introduced the sync flush, which we need from
internal callers like blk_mq_quiesce_queue(). However, we also
call the stop helpers from drivers, particularly from ->queue_rq()
when we have to stop processing for a bit. We can't block from
those locations, and we don't have to guarantee that we're
fully flushed.

Reviewed-by: Bart Van Assche <redacted>=