From: Bart Van Assche <Bart.VanAssche@wdc.com>
To: "tj@kernel.org" <tj@kernel.org>, "axboe@kernel.dk" <axboe@kernel.dk>
Cc: "kernel-team@fb.com" <kernel-team@fb.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"osandov@fb.com" <osandov@fb.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"oleg@redhat.com" <oleg@redhat.com>, "hch@lst.de" <hch@lst.de>
Subject: Re: [PATCH 6/6] blk-mq: remove REQ_ATOM_STARTED
Date: Tue, 12 Dec 2017 22:20:39 +0000 [thread overview]
Message-ID: <1513117238.2999.54.camel@wdc.com> (raw)
In-Reply-To: <20171212190134.535941-7-tj@kernel.org>
On Tue, 2017-12-12 at 11:01 -0800, Tejun Heo wrote:
> @@ -409,7 +407,7 @@ static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved)
> const struct show_busy_params *params = data;
>
> if (blk_mq_map_queue(rq->q, rq->mq_ctx->cpu) == params->hctx &&
> - test_bit(REQ_ATOM_STARTED, &rq->atomic_flags))
> + blk_mq_rq_state(rq) != MQ_RQ_IDLE)
> __blk_mq_debugfs_rq_show(params->m,
> list_entry_rq(&rq->queuelist));
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.
Thanks,
Bart.
next prev parent reply other threads:[~2017-12-12 22:20 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-12 19:01 [PATCHSET v2] blk-mq: reimplement timeout handling Tejun Heo
2017-12-12 19:01 ` [PATCH 1/6] blk-mq: protect completion path with RCU Tejun Heo
2017-12-13 3:30 ` jianchao.wang
2017-12-13 16:13 ` Tejun Heo
2017-12-14 2:09 ` jianchao.wang
2017-12-14 17:01 ` Bart Van Assche
2017-12-14 18:14 ` tj
2017-12-12 19:01 ` [PATCH 2/6] blk-mq: replace timeout synchronization with a RCU and generation based scheme Tejun Heo
2017-12-12 21:37 ` Bart Van Assche
2017-12-12 21:44 ` tj
2017-12-13 5:07 ` jianchao.wang
2017-12-13 16:13 ` Tejun Heo
2017-12-14 18:51 ` Bart Van Assche
2017-12-14 19:19 ` tj
2017-12-14 21:13 ` Bart Van Assche
2017-12-15 13:30 ` tj
2017-12-14 20:20 ` Peter Zijlstra
2017-12-14 21:42 ` Bart Van Assche
2017-12-14 21:54 ` Peter Zijlstra
2017-12-15 2:12 ` jianchao.wang
2017-12-15 7:31 ` Peter Zijlstra
2017-12-15 15:14 ` jianchao.wang
2017-12-15 2:39 ` Mike Galbraith
2017-12-15 13:50 ` tj
2017-12-12 19:01 ` [PATCH 3/6] blk-mq: use blk_mq_rq_state() instead of testing REQ_ATOM_COMPLETE Tejun Heo
2017-12-12 19:01 ` [PATCH 4/6] blk-mq: make blk_abort_request() trigger timeout path Tejun Heo
2017-12-14 18:56 ` Bart Van Assche
2017-12-14 19:26 ` tj
2017-12-12 19:01 ` [PATCH 5/6] blk-mq: remove REQ_ATOM_COMPLETE usages from blk-mq Tejun Heo
2017-12-12 19:01 ` [PATCH 6/6] blk-mq: remove REQ_ATOM_STARTED Tejun Heo
2017-12-12 22:20 ` Bart Van Assche [this message]
2017-12-12 22:22 ` tj
2017-12-12 20:23 ` [PATCHSET v2] blk-mq: reimplement timeout handling Jens Axboe
2017-12-12 21:40 ` Tejun Heo
2017-12-20 23:41 ` Bart Van Assche
2017-12-21 0:08 ` tj
2017-12-21 1:00 ` Bart Van Assche
-- strict thread matches above, loose matches on Subject: below --
2017-12-09 19:25 [PATCHSET] " Tejun Heo
2017-12-09 19:25 ` [PATCH 6/6] blk-mq: remove REQ_ATOM_STARTED Tejun Heo
2017-12-12 10:09 ` jianchao.wang
2017-12-12 17:01 ` Tejun Heo
2017-12-12 17:26 ` Tejun Heo
2017-12-13 3:05 ` jianchao.wang
2017-12-13 16:09 ` Tejun Heo
2017-12-14 2:14 ` jianchao.wang
2017-12-12 11:17 ` Nikolay Borisov
2017-12-12 17:29 ` Tejun Heo
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