From: Keith Busch <keith.busch@intel.com>
To: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Jianchao Wang <jianchao.w.wang@oracle.com>,
Ming Lei <ming.lei@redhat.com>
Subject: Re: [PATCH 5/5] blk-mq: Rework blk-mq timeout handling again
Date: Fri, 27 Jul 2018 10:46:28 -0600 [thread overview]
Message-ID: <20180727164627.GB20829@localhost.localdomain> (raw)
In-Reply-To: <20180727162042.13425-6-bart.vanassche@wdc.com>
On Fri, Jul 27, 2018 at 09:20:42AM -0700, Bart Van Assche wrote:
> + ret = req->q->mq_ops->timeout(req, reserved);
> + /*
> + * BLK_EH_DONT_RESET_TIMER means that the block driver either
> + * completed the request or still owns the request and will
> + * continue processing the timeout asynchronously. In the
> + * latter case, if blk_mq_complete_request() was called while
> + * the timeout handler was in progress, ignore that call.
> + */
> + if (ret == BLK_EH_DONT_RESET_TIMER)
> + return;
This is how completions get lost.
next prev parent reply other threads:[~2018-07-27 16:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 16:20 [PATCH 0/5] Improve blk-mq performance Bart Van Assche
2018-07-27 16:20 ` [PATCH 1/5] blk-mq: Rename BLK_EH_DONE into BLK_EH_DONT_RESET_TIMER Bart Van Assche
2018-07-27 16:20 ` [PATCH 2/5] block: Remove a superfluous #include directive Bart Van Assche
2018-07-27 16:20 ` [PATCH 3/5] block: Split blk_add_timer() Bart Van Assche
2018-07-27 16:29 ` Keith Busch
2018-07-27 16:31 ` Bart Van Assche
2018-07-27 16:20 ` [PATCH 4/5] block: Simplify blk_add_timer() and blk_mq_add_timer() Bart Van Assche
2018-07-27 16:20 ` [PATCH 5/5] blk-mq: Rework blk-mq timeout handling again Bart Van Assche
2018-07-27 16:46 ` Keith Busch [this message]
2018-07-27 16:51 ` Bart Van Assche
2018-07-27 16:57 ` Keith Busch
2018-07-27 16:59 ` Bart Van Assche
2018-07-27 17:04 ` Keith Busch
2018-07-27 17:14 ` Bart Van Assche
2018-07-27 17:58 ` Keith Busch
2018-07-27 18:09 ` Bart Van Assche
2018-07-27 16:22 ` [PATCH 0/5] Improve blk-mq performance Bart Van Assche
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