linux-kernel - Re: [RFC PATCH v3 2/3] blk-mq: Freeze and quiesce all queues for tagset in elevator

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Message-ID: <072178c2-a112-8f35-8f60-e5c1396561d7@acm.org>
Date:   Mon, 8 Mar 2021 11:35:11 -0800
From:   Bart Van Assche <bvanassche@....org>
To:     John Garry <john.garry@...wei.com>, hare@...e.de,
        ming.lei@...hat.com, axboe@...nel.dk, hch@....de
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        pragalla@...eaurora.org, kashyap.desai@...adcom.com,
        yuyufen@...wei.com
Subject: Re: [RFC PATCH v3 2/3] blk-mq: Freeze and quiesce all queues for
 tagset in elevator_exit()

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.