Re: Re: [PATCH 1/4] blk-mq: update comment for blk_mq_quiesce_queue_nowait()

[Jinlong Chen]

> 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.

Ok, I guess I need to read the per-tag_set quiesce patch series.

Thanks!
Jinlong Chen