linux-kernel - Re: [PATCH] block: revert pushing the final release of request

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Message-ID: <63873791-e303-aece-94c5-efb2a6976363@huawei.com>
Date:   Fri, 7 Feb 2020 20:24:59 +0800
From:   "yukuai (C)" <yukuai3@...wei.com>
To:     Ming Lei <ming.lei@...hat.com>
CC:     <axboe@...nel.dk>, <chaitanya.kulkarni@....com>,
        <damien.lemoal@....com>, <bvanassche@....org>,
        <dhowells@...hat.com>, <asml.silence@...il.com>,
        <ajay.joshi@....com>, <linux-block@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <yi.zhang@...wei.com>,
        <zhangxiaoxu5@...wei.com>, <luoshijie1@...wei.com>
Subject: Re: [PATCH] block: revert pushing the final release of request_queue
 to a workqueue.

On 2020/2/7 18:26, yukuai (C) wrote:
> The reason of the problem is because the final release of request_queue
> may be called after loop_remove() returns.

The description is not accurate. The reason of the problem is that
__blk_trace_setup() called before the final release of request_queue
returns.(step 4 before step 5)

Thanks!
Yu Kuai