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From: Ming Lei <ming.lei@redhat.com>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	Christoph Hellwig <hch@lst.de>, Jan Kara <jack@suse.cz>,
	Damien Le Moal <damien.lemoal@opensource.wdc.com>,
	Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	ming.lei@redhat.com
Subject: Re: [PATCH 2/2] block: Split and submit bios in LBA order
Date: Tue, 21 Mar 2023 08:44:36 +0800	[thread overview]
Message-ID: <ZBj99Oy5FPDI+Gdn@ovpn-8-18.pek2.redhat.com> (raw)
In-Reply-To: <50dfa89c-19fa-b655-f6b8-b8853b066c75@acm.org>

On Mon, Mar 20, 2023 at 04:32:57PM -0700, Bart Van Assche wrote:
> On 3/20/23 16:28, Ming Lei wrote:
> > On Fri, Mar 17, 2023 at 04:45:46PM -0700, Bart Van Assche wrote:
> > > Thanks for having taken a look. This patch series is intended for
> > > REQ_OP_WRITE requests and not for REQ_OP_ZONE_APPEND requests.
> > 
> > But you are talking about host-managed zoned device, and the write
> > should have to be zone append, right?
> 
> Hi Ming,
> 
> The use case I'm looking at is Android devices with UFS storage. UFS is
> based on SCSI and hence only REQ_OP_WRITE is supported natively. There is a
> REQ_OP_ZONE_APPEND emulation in drivers/scsi/sd_zbc.c but it restricts the
> queue depth to one.

But is this UFS one host-managed zoned device? If yes, this "REQ_OP_WRITE"
still should have been handled as REQ_OP_ZONE_APPEND? Otherwise, I don't
think it is host-managed, and your patch isn't needed too.


Thanks,
Ming


  reply	other threads:[~2023-03-21  0:45 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-17 19:59 [PATCH 0/2] Submit split bios in LBA order Bart Van Assche
2023-03-17 19:59 ` [PATCH 1/2] block: Split blk_recalc_rq_segments() Bart Van Assche
2023-03-18  6:38   ` Christoph Hellwig
2023-03-17 19:59 ` [PATCH 2/2] block: Split and submit bios in LBA order Bart Van Assche
2023-03-17 22:28   ` Jan Kara
2023-03-18  6:33     ` Christoph Hellwig
2023-03-17 23:38   ` Ming Lei
2023-03-17 23:45     ` Bart Van Assche
2023-03-20 23:28       ` Ming Lei
2023-03-20 23:32         ` Bart Van Assche
2023-03-21  0:44           ` Ming Lei [this message]
2023-03-21  1:46             ` Damien Le Moal
2023-03-21  2:17               ` Ming Lei
2023-03-21  3:24                 ` Damien Le Moal
2023-03-21  8:00                   ` Ming Lei
2023-03-21  8:51                     ` Damien Le Moal
2023-03-21  9:09                       ` Christoph Hellwig
2023-03-21  9:50                         ` Damien Le Moal
2023-03-21  5:55           ` Christoph Hellwig
2023-03-21 14:36             ` Bart Van Assche
2023-03-23  8:26               ` Christoph Hellwig
2023-03-23 10:28                 ` Damien Le Moal
2023-03-23 16:27                   ` Bart Van Assche
2023-03-23 22:53                     ` Damien Le Moal
2023-03-24 16:55                       ` Bart Van Assche
2023-03-25  2:00                         ` Damien Le Moal
2023-03-25 16:31                           ` Bart Van Assche
2023-03-26  1:45                             ` Damien Le Moal
2023-03-26 23:45                               ` Christoph Hellwig
2023-03-27 21:06                                 ` Bart Van Assche
2023-03-27 23:43                                   ` Christoph Hellwig
2023-04-06 20:30                                     ` Bart Van Assche
2023-03-27 21:20                               ` Bart Van Assche
2023-03-18  6:42   ` Christoph Hellwig
2023-03-18  6:29 ` [PATCH 0/2] Submit split " Christoph Hellwig
2023-03-20 17:22   ` Bart Van Assche
2023-03-20 21:06     ` Khazhy Kumykov
2023-03-23  8:27     ` Christoph Hellwig
2023-03-24 17:05       ` Bart Van Assche
2023-03-25  2:15         ` Damien Le Moal
2023-03-26 23:42           ` Christoph Hellwig
2023-03-26 23:44         ` Christoph Hellwig
2023-04-06 20:32           ` Bart Van Assche

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