linux-kernel - Re: [patch v8 4/7] nbd: don't start request if nbd_queue

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Message-ID: <YUM9GIBBttUG9DcX@T590>
Date:   Thu, 16 Sep 2021 20:48:24 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Yu Kuai <yukuai3@...wei.com>
Cc:     josef@...icpanda.com, axboe@...nel.dk, hch@...radead.org,
        linux-block@...r.kernel.org, nbd@...er.debian.org,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com
Subject: Re: [patch v8 4/7] nbd: don't start request if nbd_queue_rq() failed

On Thu, Sep 16, 2021 at 05:33:47PM +0800, Yu Kuai wrote:
> commit 6a468d5990ec ("nbd: don't start req until after the dead
> connection logic") move blk_mq_start_request() from nbd_queue_rq()
> to nbd_handle_cmd() to skip starting request if the connection is
> dead. However, request is still started in other error paths.
> 
> Currently, blk_mq_end_request() will be called immediately if
> nbd_queue_rq() failed, thus start request in such situation is
> useless. So remove blk_mq_start_request() from error paths in
> nbd_handle_cmd().
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---

Reviewed-by: Ming Lei <ming.lei@...hat.com>

-- 
Ming