From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oleksandr Natalenko <oleksandr-L/hGvWKi9zur34vxu0UX7A@public.gmane.org>
Subject: Re: Slow boot in QEMU with virtio-scsi disks
Date: Sat, 11 Aug 2018 19:39:56 +0200
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To: Ming Lei <tom.leiming-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>, Linux SCSI List <linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "Martin K. Petersen" <martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>, qemu-devel <qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org>, Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Omar Sandoval <osandov-b10kYP2dOMg@public.gmane.org>, linux-block <linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Greg Kurz <groug-Bxea+6Xhats@public.gmane.org>, Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>, Paolo Bonzini <pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Ming Lei <ming.lei-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, qemu-discuss-qX2TKyscuCcdnm+yROfE0A@public.gmane.org, Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
List-Id: linux-scsi@vger.kernel.org

Hi.

On 11.08.2018 14:23, Ming Lei wrote:
> Please test for-4.19/block:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/log/?h=for-4.19/block
> 
> This slow boot issue should have been fixed by the following commits:
> 
> 1311326cf475 blk-mq: avoid to synchronize rcu inside 
> blk_cleanup_queue()
> 97889f9ac24f blk-mq: remove synchronize_rcu() from 
> blk_mq_del_queue_tag_set()
> 5815839b3ca1 blk-mq: introduce new lock for protecting 
> hctx->dispatch_wait
> 2278d69f030f blk-mq: don't pass **hctx to blk_mq_mark_tag_wait()
> 8ab6bb9ee8d0 blk-mq: cleanup blk_mq_get_driver_tag()

Indeed, I can confirm that these commits fix the issue.

Thanks a lot.

-- 
   Oleksandr Natalenko (post-factum)