From: Christoph Hellwig <hch@lst.de>
To: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Christoph Hellwig <hch@lst.de>, Hannes Reinecke <hare@suse.com>
Subject: Re: [PATCH v2 3/5] blk-mq: Introduce blk_mq_ops.restart_hctx
Date: Tue, 4 Apr 2017 08:42:05 +0200 [thread overview]
Message-ID: <20170404064205.GC9168@lst.de> (raw)
In-Reply-To: <20170403232228.11208-4-bart.vanassche@sandisk.com>
On Mon, Apr 03, 2017 at 04:22:26PM -0700, Bart Van Assche wrote:
> If a tag set is shared among multiple hardware queues, leave
> it to the block driver to rerun hardware queues. Hence remove
> QUEUE_FLAG_RESTART and introduce blk_mq_ops.restart_hctx.
> Remove blk_mq_sched_mark_restart_queue() because this
> function has no callers.
This looks fine, but I think it needs to also actually implement at
least a dummy restart_hctx method for SCSI and NVMe to keep the
existing functionality.
next prev parent reply other threads:[~2017-04-04 6:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-03 23:22 [PATCH v2 0/5] Avoid that scsi-mq queue processing stalls Bart Van Assche
2017-04-03 23:22 ` [PATCH v2 1/5] blk-mq: Export blk_mq_sched_restart_hctx() Bart Van Assche
2017-04-04 6:40 ` Christoph Hellwig
2017-04-03 23:22 ` [PATCH v2 2/5] blk-mq: Make it safe to use RCU to iterate over blk_mq_tag_set.tag_list Bart Van Assche
2017-04-04 6:40 ` Christoph Hellwig
2017-04-04 15:55 ` Bart Van Assche
2017-04-03 23:22 ` [PATCH v2 3/5] blk-mq: Introduce blk_mq_ops.restart_hctx Bart Van Assche
2017-04-04 6:42 ` Christoph Hellwig [this message]
2017-04-05 20:41 ` Omar Sandoval
2017-04-05 20:51 ` Bart Van Assche
2017-04-05 20:54 ` Omar Sandoval
2017-04-03 23:22 ` [PATCH v2 4/5] scsi: Add scsi_restart_hctx() Bart Van Assche
2017-04-04 6:42 ` Christoph Hellwig
2017-04-04 15:56 ` Bart Van Assche
2017-04-05 6:20 ` Christoph Hellwig
2017-04-05 17:36 ` Bart Van Assche
2017-04-03 23:22 ` [PATCH v2 5/5] scsi: Ensure that scsi_run_queue() runs all hardware queues Bart Van Assche
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