From: Jens Axboe <axboe@kernel.dk>
To: Bart Van Assche <bvanassche@acm.org>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Christoph Hellwig <hch@infradead.org>,
Ming Lei <ming.lei@redhat.com>, Hannes Reinecke <hare@suse.com>
Subject: Re: [PATCH] blk-mq: Swap two calls in blk_mq_exit_queue()
Date: Fri, 14 May 2021 08:59:43 -0600 [thread overview]
Message-ID: <d1b1f123-9b47-8805-0b86-2fa9f6b19bb5@kernel.dk> (raw)
In-Reply-To: <20210513171529.7977-1-bvanassche@acm.org>
On 5/13/21 11:15 AM, Bart Van Assche wrote:
> If a tag set is shared across request queues (e.g. SCSI LUNs) then the
> block layer core keeps track of the number of active request queues in
> tags->active_queues. blk_mq_tag_busy() and blk_mq_tag_idle() update that
> atomic counter if the hctx flag BLK_MQ_F_TAG_QUEUE_SHARED is set. Make
> sure that blk_mq_exit_queue() calls blk_mq_tag_idle() before that flag is
> cleared by blk_mq_del_queue_tag_set().
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2021-05-14 14:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-13 17:15 [PATCH] blk-mq: Swap two calls in blk_mq_exit_queue() Bart Van Assche
2021-05-14 0:55 ` Ming Lei
2021-05-14 14:59 ` Jens Axboe [this message]
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