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Date: Wed, 22 Aug 2018 12:15:23 +0200
From: Greg Kurz <groug@kaod.org>
To: Oleksandr Natalenko <oleksandr@natalenko.name>
Cc: Ming Lei <tom.leiming@gmail.com>, Ming Lei <ming.lei@redhat.com>, Omar
 Sandoval <osandov@fb.com>, "Martin K. Petersen"
 <martin.petersen@oracle.com>, Christoph Hellwig <hch@lst.de>, Paolo Bonzini
 <pbonzini@redhat.com>, Hannes Reinecke <hare@suse.de>, Jens Axboe
 <axboe@kernel.dk>, Linux SCSI List <linux-scsi@vger.kernel.org>,
 linux-block <linux-block@vger.kernel.org>, Linux Kernel Mailing List
 <linux-kernel@vger.kernel.org>, qemu-discuss@nongnu.org, qemu-devel
 <qemu-devel@nongnu.org>
Subject: Re: Slow boot in QEMU with virtio-scsi disks
Message-ID: <20180822121523.4494871d@bahia.lan>
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On Sat, 11 Aug 2018 19:39:56 +0200
Oleksandr Natalenko <oleksandr@natalenko.name> wrote:

> 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.
> 

So do I.

Thanks Ming Lei for the fix !

Cheers,

--
Greg