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From: Hans de Goede <hdegoede@redhat.com>
To: Damien Le Moal <Damien.LeMoal@wdc.com>,
	Kate Hsuan <hpa@redhat.com>, Jens Axboe <axboe@kernel.dk>
Cc: "linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 0/1] libata: Add ATA_HORKAGE_NONCQ_ON_AMD for Samsung 860 and 870 SSD.
Date: Tue, 31 Aug 2021 09:38:04 +0200	[thread overview]
Message-ID: <a76b2acd-edfa-55b2-907c-f1faa8ce4914@redhat.com> (raw)
In-Reply-To: <DM6PR04MB708147357F91D5AEB6128A2AE7CB9@DM6PR04MB7081.namprd04.prod.outlook.com>

Hi,

On 8/30/21 11:45 PM, Damien Le Moal wrote:
> On 2021/08/30 23:43, Kate Hsuan wrote:
>> Many users reported the issue when running the system with Samsung 860,
>> 870 SSD, and AMD chipset. Therefore, completely disabling the NCQ can
>> avoid this issue.
>>
>> Entire disabling NCQ for Samsung 860/870 SSD will cause I/O performance
>> drop. In this case, a flag ATA_HORKAGE_NONCQ_ON_AMD is introduced to
>> used to perform an additional check for these SSDs. If it finds its parent
>> ATA controller is AMD, the NCQ will be disabled. Otherwise, the NCQ is kept
>> to enable.
> 
> For a single patch, generally, a cover letter is not needed. Especially so in
> this case since your cover letter message is the same as the patch commit message.
> 
>>
>> Changes since v3
>> * Modified the flag from ATA_HORKAGE_NONCQ_ON_ASMEDIA_AMD_MARVELL to
>>   ATA_HORKAGE_NONCQ_ON_AMD.
>> * Modified and fixed the code to completely disable NCQ on AMD controller.
> 
> Technically, this is a v2 right ? Also, by "completely", did you mean "always" ?
> (see patch comments).

Right, as mentioned in my reply to the v1 which was accidentally labelled v2
I suggested to just make this v3 to avoid confusion, otherwise we would have
2 v2-s.

Regards,

Hans


      reply	other threads:[~2021-08-31  7:38 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-30 14:42 Kate Hsuan
2021-08-30 14:42 ` [PATCH v3 1/1] " Kate Hsuan
2021-08-30 15:05   ` Hans de Goede
2021-08-30 21:58   ` Damien Le Moal
2021-08-30 21:45 ` [PATCH v3 0/1] " Damien Le Moal
2021-08-31  7:38   ` Hans de Goede [this message]

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