linux-kernel - Re: [PATCH 6/6] blk-mq: remove REQ_ATOM

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Message-ID: <20171212222204.GM3919388@devbig577.frc2.facebook.com>
Date:   Tue, 12 Dec 2017 14:22:04 -0800
From:   "tj@...nel.org" <tj@...nel.org>
To:     Bart Van Assche <Bart.VanAssche@....com>
Cc:     "axboe@...nel.dk" <axboe@...nel.dk>,
        "kernel-team@...com" <kernel-team@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "osandov@...com" <osandov@...com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "oleg@...hat.com" <oleg@...hat.com>, "hch@....de" <hch@....de>
Subject: Re: [PATCH 6/6] blk-mq: remove REQ_ATOM_STARTED

On Tue, Dec 12, 2017 at 10:20:39PM +0000, Bart Van Assche wrote:
> The above code should show all requests owned by the block driver. Patch
> "blk-mq-debugfs: Also show requests that have not yet been started" (not yet
> in Jens' tree) changes the REQ_ATOM_STARTED test into list_empty(&rq->queuelist).
> Can that change be supported with the existing MQ_RQ_* states or will a new
> state have to be introduced to support this? See also
> https://marc.info/?l=linux-block&m=151252188411991.

If list_empty() test was correct before, it'd be correct now too.

Thnaks.

-- 
tejun