From: Hannes Reinecke <hare@suse.de>
To: "hch@lst.de" <hch@lst.de>
Cc: "axboe@kernel.dk" <axboe@kernel.dk>,
"Niklas.Cassel@wdc.com" <Niklas.Cassel@wdc.com>,
"javier@javigon.com" <javier@javigon.com>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"joshi.k@samsung.com" <joshi.k@samsung.com>,
"Klaus B. Jensen" <k.jensen@samsung.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
Keith Busch <kbusch@kernel.org>,
Javier Gonzalez <javier.gonz@samsung.com>
Subject: Re: [PATCH V2] nvme: report capacity 0 for non supported ZNS SSDs
Date: Wed, 4 Nov 2020 15:46:02 +0100 [thread overview]
Message-ID: <01c72262-1839-05cc-ba9a-94b260511a7c@suse.de> (raw)
In-Reply-To: <20201104142908.GA7941@lst.de>
On 11/4/20 3:29 PM, hch@lst.de wrote:
> On Wed, Nov 04, 2020 at 03:26:46PM +0100, Hannes Reinecke wrote:
>> I hardly dare to mention bsg here; but the is pretty similar to what it set
>> out to do ...
>
> Except that:
>
> a) we created a complete mess with bsg by overloading the scsi ioctls
> with some of the transport stuff.
> b) bsg would not work with existing tools. A character device that
> accepts the same ioctl will just work.
>
... as would a bsg device which could accept said ioctl ...
Plus it feels a bit weird, having a generic command passthrough
character device which is then avoided in favour of a protocol-specific
command passthrough device.
Which we had been arguing for years with IHVs for _not_ doing it.
So what is different here?
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
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next prev parent reply other threads:[~2020-11-04 14:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20201102161505eucas1p19415e34eb0b14c7eca5a2c648569cf1e@eucas1p1.samsung.com>
[not found] ` <0916865d50c640e3aa95dc542f3986b9@CAMSVWEXC01.scsc.local>
2020-11-02 16:30 ` [PATCH V2] nvme: report capacity 0 for non supported ZNS SSDs Niklas Cassel
2020-11-02 21:25 ` Javier Gonzalez
2020-11-02 18:08 ` [PATCH V2] " hch
2020-11-02 18:33 ` Keith Busch
2020-11-02 18:58 ` hch
2020-11-02 21:24 ` Javier Gonzalez
2020-11-03 9:06 ` hch
2020-11-03 14:10 ` Javier Gonzalez
2020-11-03 15:26 ` hch
2020-11-03 15:54 ` Javier Gonzalez
2020-11-04 14:26 ` [PATCH V2] " Hannes Reinecke
2020-11-04 14:29 ` hch
2020-11-04 14:46 ` Hannes Reinecke [this message]
2020-11-05 7:37 ` hch
2020-11-05 7:42 ` Hannes Reinecke
2020-11-02 13:22 Javier González
2020-11-02 15:44 ` Keith Busch
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