linux-kernel - [PATCH 0/2] Fix requests loss during virtio-blk device suspend

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Date: Mon, 22 Jan 2024 19:07:20 +0800
From: Yi Sun <yi.sun@...soc.com>
To: <axboe@...nel.dk>, <mst@...hat.com>, <jasowang@...hat.com>
CC: <xuanzhuo@...ux.alibaba.com>, <pbonzini@...hat.com>, <stefanha@...hat.com>,
        <virtualization@...ts.linux.dev>, <linux-block@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <yi.sun@...soc.com>,
        <zhiguo.niu@...soc.com>, <hongyu.jin@...soc.com>,
        <sunyibuaa@...il.com>
Subject: [PATCH 0/2] Fix requests loss during virtio-blk device suspend

When a virtio-blk device performs a large number of IO operations and
requires sleep at the same time, some requests may never be successfully
processed. 

It must be ensured that no requests in virtqueues before deleting.
The request becoming complete status means that the request has been removed
from the virtqueue.

Yi Sun (2):
  blk-mq: introduce blk_mq_tagset_wait_request_completed()
  virtio-blk: Ensure no requests in virtqueues before deleting vqs.

 block/blk-mq-tag.c         | 29 +++++++++++++++++++++++++++++
 drivers/block/virtio_blk.c |  6 ++++--
 include/linux/blk-mq.h     |  1 +
 3 files changed, 34 insertions(+), 2 deletions(-)

-- 
2.25.1