linux-kernel - Re: [RFC PATCH] nvme: add NO APST quirk for Kioxia device

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Date:   Wed, 10 Nov 2021 06:08:10 +0000
From:   Chaitanya Kulkarni <chaitanyak@...dia.com>
To:     Enzo Matsumiya <ematsumiya@...e.de>
CC:     "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Sagi Grimberg <sagi@...mberg.me>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [RFC PATCH] nvme: add NO APST quirk for Kioxia device

Enzo,

On 11/9/2021 7:04 AM, Enzo Matsumiya wrote:
> On 11/09, Christoph Hellwig wrote:
>> On Fri, Nov 05, 2021 at 11:08:57PM -0300, Enzo Matsumiya wrote:
>>> +    },
>>> +    {
>>> +        /*
>>> +         * This Kioxia device times out and aborts I/O during any load,
>>> +         * but more easily reproducible with discards (fstrim).
>>> +         *
>>> +         * Device is left in a state that is also not possible to 
>>> use "nvme set-feature"
>>> +         * to disable APST, but booting with 
>>> nvme_core.default_ps_max_latency=0 works.
>>> +         */
>>
>> Overly long lines here, but I can fix that up.
> 
> Missed that, sorry. Thanks.
> 
>>  Do you have a product
>> name for this device or is just a nameless OEM controller?
> 
> I didn't, had to google. I see it listed on Kioxia's website as
> CD6-V Series (6.4T model), but since customer was running on an
> DL380 Gen10, I suspect it could also be HPE PE8030 (PN P19837-B21).
>

You can get more information about this controller using nvme-cli
id-ctrl command.


> 
> Cheers,
> 
> Enzo
>