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Date: Sat, 11 Aug 2018 19:39:56 +0200
From: Oleksandr Natalenko <oleksandr@natalenko.name>
To: Ming Lei <tom.leiming@gmail.com>
Cc: 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>, Greg Kurz <groug@kaod.org>,
 qemu-discuss@nongnu.org, qemu-devel <qemu-devel@nongnu.org>
Subject: Re: Slow boot in QEMU with virtio-scsi disks
In-Reply-To: <CACVXFVO1pN=CZvNY8Q4wBrAoA=3w8Ew38aGqpOSHJ1uYAM-sxw@mail.gmail.com>
References: <f40092b20856d07bd7f870abf5ea939e@natalenko.name>
 <CACVXFVO1pN=CZvNY8Q4wBrAoA=3w8Ew38aGqpOSHJ1uYAM-sxw@mail.gmail.com>
Message-ID: <98344e68266e447826f133ad14d0c83d@natalenko.name>
List-ID: <linux-block@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)