From: kbusch@kernel.org (Keith Busch)
Subject: [PATCH] nvme-loop: Fix race between completions and shutdown
Date: Mon, 6 May 2019 09:17:27 -0600 [thread overview]
Message-ID: <20190506151727.GB2164@localhost.localdomain> (raw)
In-Reply-To: <0db7e312-0ff2-45f2-8ee1-7ad7b6fd3e5a@gmail.com>
On Tue, May 07, 2019@12:07:47AM +0900, Minwoo Im wrote:
>
> If don't mind, can I ask how can blk_mq_tagset_busy_iter() make sure that no
> more requests are coming into this request_queue during this iteration ?
If a queue is frozen, there can't be any allocated tags, so calling
blk_mq_tagset_busy_iter for such a queue is a no-op.
I'm not sure you actually want to freeze in this path though. That may
block forever if a request needs to be requeued.
next prev parent reply other threads:[~2019-05-06 15:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-06 14:52 [PATCH] nvme-loop: Fix race between completions and shutdown Minwoo Im
2019-05-06 14:53 ` Keith Busch
2019-05-06 15:07 ` Minwoo Im
2019-05-06 15:17 ` Keith Busch [this message]
2019-05-06 15:46 ` Minwoo Im
2019-05-06 15:52 ` Minwoo Im
2019-05-06 15:56 ` Keith Busch
2019-05-06 16:25 ` Minwoo Im
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