linux-kernel - Re: [PATCH V2] virtio-blk: Ensure no requests in virtqueues before deleting vqs.

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Date: Thu, 08 Feb 2024 11:32:46 -0700
From: Jens Axboe <axboe@...nel.dk>
To: stefanha@...hat.com, mst@...hat.com, jasowang@...hat.com, 
 Yi Sun <yi.sun@...soc.com>
Cc: sunyibuaa@...il.com, hongyu.jin@...soc.com, zhiguo.niu@...soc.com, 
 xuanzhuo@...ux.alibaba.com, pbonzini@...hat.com, 
 virtualization@...ts.linux.dev, linux-block@...r.kernel.org, 
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] virtio-blk: Ensure no requests in virtqueues before
 deleting vqs.

On Mon, 29 Jan 2024 16:52:50 +0800, Yi Sun wrote:
> Ensure no remaining requests in virtqueues before resetting vdev and
> deleting virtqueues. Otherwise these requests will never be completed.
> It may cause the system to become unresponsive.
> 
> Function blk_mq_quiesce_queue() can ensure that requests have become
> in_flight status, but it cannot guarantee that requests have been
> processed by the device. Virtqueues should never be deleted before
> all requests become complete status.
> 
> [...]

Applied, thanks!

[1/1] virtio-blk: Ensure no requests in virtqueues before deleting vqs.
      (no commit info)

Best regards,
-- 
Jens Axboe