linux-kernel - Re: complete boot failure in 4.5-rc1 caused by nvme: make SG

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Message-ID: <20160208161559.GC25111@localhost.localdomain>
Date:	Mon, 8 Feb 2016 16:15:59 +0000
From:	Keith Busch <keith.busch@...el.com>
To:	Hannes Reinecke <hare@...e.de>
Cc:	Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagig@....mellanox.co.il>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
	linux-scsi <linux-scsi@...r.kernel.org>,
	"linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: complete boot failure in 4.5-rc1 caused by nvme: make SG_IO
 support optional

On Mon, Feb 08, 2016 at 04:19:13PM +0100, Hannes Reinecke wrote:
> Ok, so what about having a 'wwid' attribute which provides combined
> information (like scsi has)?

That looks like the sensible thing to do. Thanks for pointer.

Going forward, I will solicite more feedback from scsi developers
so NVMe's external attributes better align with storage that already
solved our issues. I agree with Christoph that we never should have
relied on SCSI translations for NVMe, but we don't want to reinvent
generic solutions either.