From: Christoph Hellwig <hch@infradead.org>
To: Damien Le Moal <damien.lemoal@wdc.com>
Cc: linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Hannes Reinecke <hare@suse.de>, Christoph Hellwig <hch@lst.de>,
Bart Van Assche <Bart.VanAssche@sandisk.com>
Subject: Re: [PATCH] scsi: sd_zbc: Disable zoned block devices with scsi-mq
Date: Thu, 17 Aug 2017 00:59:16 -0700 [thread overview]
Message-ID: <20170817075916.GA28379@infradead.org> (raw)
In-Reply-To: <20170817024550.9845-1-damien.lemoal@wdc.com>
On Thu, Aug 17, 2017 at 11:45:50AM +0900, Damien Le Moal wrote:
> blk-mq may not maintain write requests order at dispatch time. So host
> managed drives will not reliably work. Worse, potential reordering of
> write requests on requeue may cause the zone write locking code to
> deadlock command dispatch to the disk. So for now, until the write
> ordering issue is fixed, do not support zoned block devices with
> scsi-mq by showing a 0 LBA capacity disk.
NAK. Please fix the issue instead of this.
next prev parent reply other threads:[~2017-08-17 7:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-17 2:45 [PATCH] scsi: sd_zbc: Disable zoned block devices with scsi-mq Damien Le Moal
2017-08-17 7:59 ` Christoph Hellwig [this message]
2017-08-17 12:19 ` Damien Le Moal
2017-08-17 12:24 ` Damien Le Moal
2017-08-17 15:01 ` Bart Van Assche
2017-08-18 0:21 ` Damien Le Moal
2017-08-21 15:33 ` hch
2017-08-21 20:31 ` Martin K. Petersen
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