From: Ming Lei <ming.lei@redhat.com>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Peter Wang <peter.wang@mediatek.com>,
Chao Leng <lengchao@huawei.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] blk-mq: Make blk_mq_quiesce_tagset() hold the tag list mutex less long
Date: Wed, 23 Oct 2024 10:15:43 +0800 [thread overview]
Message-ID: <ZxhcT46a6glC0Db7@fedora> (raw)
In-Reply-To: <20241022181617.2716173-1-bvanassche@acm.org>
On Tue, Oct 22, 2024 at 11:16:17AM -0700, Bart Van Assche wrote:
> Make sure that the tag_list_lock mutex is no longer held than necessary.
> This change reduces latency if e.g. blk_mq_quiesce_tagset() is called
> concurrently from more than one thread. This function is used by the
> NVMe core and also by the UFS driver.
>
> Reported-by: Peter Wang <peter.wang@mediatek.com>
> Cc: Chao Leng <lengchao@huawei.com>
> Cc: Ming Lei <ming.lei@redhat.com>
> Cc: stable@vger.kernel.org
> Fixes: commit 414dd48e882c ("blk-mq: add tagset quiesce interface")
> Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Thanks,
Ming
prev parent reply other threads:[~2024-10-23 2:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-22 18:16 [PATCH] blk-mq: Make blk_mq_quiesce_tagset() hold the tag list mutex less long Bart Van Assche
2024-10-22 20:08 ` Keith Busch
2024-10-22 22:25 ` Jens Axboe
2024-10-23 2:15 ` Ming Lei [this message]
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