On Tue, Nov 01, 2022 at 11:11:34PM +0800, Jinlong Chen wrote: > blk_mq_quiesce_queue_nowait() is now reasonably used by scsi_host_block() > to avoid calling synchronize_rcu() for each LUN. We should not consider to > remove it. I strongly disagree about this being a reasonable use. What SCSI did there is a horrible hack that should have never been merged. The right thing to do is the per-tag_set quiesce that we've been working on.