linux-kernel - Re: [PATCHv2 7/7] nvme: add support for enhanced metadata

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Date:   Wed, 02 Feb 2022 10:47:44 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Keith Busch <kbusch@...nel.org>
Cc:     Hannes Reinecke <hare@...e.de>, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        axboe@...nel.dk, hch@....de, martin.petersen@...cle.com,
        colyli@...e.de
Subject: Re: [PATCHv2 7/7] nvme: add support for enhanced metadata


Keith,

> For type1 and 2, I believe tag_size refers to the "application" tag,
> which is 2 bytes here.

Yep.

> The reason it is 8 bytes for type3 is because there is no ref tag, so
> that portion of the metadata becomes part of the opaque application
> tag_size.

Correct.

-- 
Martin K. Petersen	Oracle Linux Engineering