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From: Keith Busch <kbusch@kernel.org>
To: Niklas Cassel <Niklas.Cassel@wdc.com>
Cc: "Hannes Reinecke" <hare@suse.de>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"hch@lst.de" <hch@lst.de>, "sagi@grimberg.me" <sagi@grimberg.me>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	"Javier González" <javier.gonz@samsung.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"Johannes Thumshirn" <Johannes.Thumshirn@wdc.com>,
	"Matias Bjorling" <Matias.Bjorling@wdc.com>,
	"Daniel Wagner" <dwagner@suse.de>
Subject: Re: [PATCHv3 3/5] nvme: implement I/O Command Sets Command Set support
Date: Tue, 23 Jun 2020 07:25:03 -0700
Message-ID: <20200623142503.GA1288900@dhcp-10-100-145-180.wdl.wdc.com> (raw)
In-Reply-To: <20200623092033.GA117742@localhost.localdomain>

On Tue, Jun 23, 2020 at 09:20:35AM +0000, Niklas Cassel wrote:
> On Tue, Jun 23, 2020 at 08:20:23AM +0200, Hannes Reinecke wrote:
> > On 6/22/20 6:25 PM, Keith Busch wrote:
> > > From: Niklas Cassel <niklas.cassel@wdc.com>
> > > -	if (ctrl->vs >= NVME_VS(1, 3, 0))
> > > +	if (ctrl->vs >= NVME_VS(1, 3, 0) || nvme_multi_css(ctrl))
> > >   		return nvme_identify_ns_descs(ctrl, nsid, ids);
> > >   	return 0;
> > >   }
> > 
> > Hmm? Are command sets even defined for something earlier than 1.3?
> 
> According to Keith, usually new features are not really tied to a
> specific NVMe version.

Not really according to me; nvme just allows controllers to implement
features ratified after the initial version release.
 
> So if someone implements/enables multiple command sets feature on
> an older base spec of NVMe, we still want to support/allow that.

Right. We don't check the version to see if multi-command sets are
supported when we initially enable it, so we shouldn't need to check the
version later.

  reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-22 16:25 [PATCHv3 0/5] nvme support for zoned namespace command set Keith Busch
2020-06-22 16:25 ` [PATCHv3 1/5] block: add capacity field to zone descriptors Keith Busch
2020-06-23  6:15   ` Hannes Reinecke
2020-06-23  8:44   ` Sagi Grimberg
2020-06-26 12:17   ` Jens Axboe
2020-06-22 16:25 ` [PATCHv3 2/5] null_blk: introduce zone capacity for zoned device Keith Busch
2020-06-23  6:16   ` Hannes Reinecke
2020-06-23  8:45   ` Sagi Grimberg
2020-06-22 16:25 ` [PATCHv3 3/5] nvme: implement I/O Command Sets Command Set support Keith Busch
2020-06-23  6:20   ` Hannes Reinecke
2020-06-23  9:20     ` Niklas Cassel
2020-06-23 14:25       ` Keith Busch [this message]
2020-06-23  8:53   ` Sagi Grimberg
2020-06-23 11:25     ` Niklas Cassel
2020-06-23 14:59       ` Keith Busch
2020-06-23 22:10       ` Keith Busch
2020-06-23 23:17         ` Sagi Grimberg
2020-06-24 17:25           ` Keith Busch
2020-06-24 17:46             ` Sagi Grimberg
2020-06-24 18:03               ` Keith Busch
2020-06-24 18:28                 ` Sagi Grimberg
2020-06-24 18:33                   ` Sagi Grimberg
2020-06-24 18:40                     ` Keith Busch
2020-06-24 19:03                       ` Sagi Grimberg
2020-06-24 21:49                         ` Keith Busch
2020-06-24 22:54                           ` Sagi Grimberg
2020-06-24 23:54                             ` Keith Busch
2020-06-23 23:20       ` Sagi Grimberg
2020-06-26  8:54     ` Christoph Hellwig
2020-06-22 16:25 ` [PATCHv3 4/5] nvme: support for multi-command set effects Keith Busch
2020-06-23  6:21   ` Hannes Reinecke
2020-06-23 17:43   ` Sagi Grimberg
2020-06-22 16:25 ` [PATCHv3 5/5] nvme: support for zoned namespaces Keith Busch
2020-06-22 16:48   ` Johannes Thumshirn
2020-06-23  6:23   ` Hannes Reinecke
2020-06-23 17:45   ` Sagi Grimberg
2020-06-24  9:11   ` Javier González
2020-06-29 13:53   ` Johannes Thumshirn

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