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Date:   Fri, 10 Jun 2022 14:05:54 +0200
From:   Pankaj Raghav <pankydev8@gmail.com>
To:     Christoph Hellwig <hch@lst.de>
Cc:     "Jason A. Donenfeld" <Jason@zx2c4.com>,
        "R, Monish Kumar" <monish.kumar.r@intel.com>,
        "open list:NVM EXPRESS DRIVER" <linux-nvme@lists.infradead.org>,
        Sagi Grimberg <sagi@grimberg.me>,
        "alan.adamson@oracle.com" <alan.adamson@oracle.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Yi Zhang <yi.zhang@redhat.com>,
        Keith Busch <kbusch@kernel.org>, "axboe@fb.com" <axboe@fb.com>,
        "Rao, Abhijeet" <abhijeet.rao@intel.com>,
        Pankaj Raghav <p.raghav@samsung.com>,
        Javier =?utf-8?B?R29uesOhbGV6?= <javier.gonz@samsung.com>
Subject: Re: 2 second nvme initialization delay regression in 5.18 [Was: Re:
 [bug report]nvme0: Admin Cmd(0x6), I/O Error (sct 0x0 / sc 0x2) MORE DNR
 observed during blktests]
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On Fri, Jun 10, 2022 at 08:14:49AM +0200, Christoph Hellwig wrote:
> The 970 seems to actually be very slightly newer than the X5.  What
> I suspect is that they actually are the same m.2 SSD or at least a
> very similar one and Samsung decided to ship it in the thunderbolt
> attached versions first.  Maybe one of the Samsung folks here can
> confirm.
> 
> That leaves us with two plausible theories:
> 
>  - the problems could be due to an earlier firmware version or
>    ASIC stepping
>  - the problems are due to the thunderbolt attachment
> 
I have forwarded this report internally within Samsung and I will post an
update once I have more information about this issue.

Cheers,
Pankaj