linux-kernel - Re: [RFC v1] nvme: add cse, ds, ms, nsze and nuse to sysfs

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Date:   Mon, 27 Nov 2023 16:56:49 +0100
From:   Christoph Hellwig <hch@....de>
To:     Keith Busch <kbusch@...nel.org>
Cc:     Christoph Hellwig <hch@....de>, Daniel Wagner <dwagner@...e.de>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Sagi Grimberg <sagi@...mberg.me>,
        Hannes Reinecke <hare@...e.de>
Subject: Re: [RFC v1] nvme: add cse, ds, ms, nsze and nuse to sysfs

On Mon, Nov 27, 2023 at 08:44:52AM -0700, Keith Busch wrote:
> > I'd probably spell out metadata_size, or probably even better
> > metadata_bytes to match the unit postfixes elsewhere in the block code.
> 
> Should this even be an nvme specific attribute? I thought we should have
> blk-integrity.c report its 'tuple_size' attribute instead. That should
> work as long as we're not dealing with extended metadata at least, but
> that's kind of a special format that doesn't have block layer support.

Reporting the tuple size is a good idea.  But is that enough for
the existing nvme-cli use case?