linux-kernel - Re: [PATCH v2] drivers/nvme/host: Fix namespace duplication check rule

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Message-ID: <20220905054958.GA1069@lst.de>
Date:   Mon, 5 Sep 2022 07:49:58 +0200
From:   "hch@....de" <hch@....de>
To:     Sungup Moon <sungup.moon@...sung.com>
Cc:     "kbusch@...nel.org" <kbusch@...nel.org>,
        "axboe@...com" <axboe@...com>, "hch@....de" <hch@....de>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] drivers/nvme/host: Fix namespace duplication check
 rule

On Thu, Sep 01, 2022 at 09:49:41AM +0900, Sungup Moon wrote:
> Some NVMe device, use EUI64 and NGUID, has fixed value EUI64 on a
> sub-system because of the bit size of ID.

Huh?  Fixed value of a EUI64 is brokem, so we must warn and ignore
those.  The whole point of the EUI64/NGUID/UUID is that they are
uniqueu per namespace.