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Subject: Re: [RFC PATCH v3 2/3] blk-mq: Freeze and quiesce all queues for
 tagset in elevator_exit()
To:     John Garry <john.garry@huawei.com>, hare@suse.de,
        ming.lei@redhat.com, axboe@kernel.dk, hch@lst.de
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From:   Bart Van Assche <bvanassche@acm.org>
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Date:   Mon, 8 Mar 2021 11:35:11 -0800
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On 3/8/21 2:50 AM, John Garry wrote:
> Please let me know further thoughts.

Hi John,

My guess is that it is safe to nest these two locks. I was asking 
because I had not found any information about the nesting in the patch 
description.

Bart.