linux-kernel - Re: [PATCH v4] libata: Add ATA_HORKAGE_NO_NCQ_ON

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Date:   Wed, 1 Sep 2021 17:56:57 +0000
From:   Tor Vic <torvic9@...lbox.org>
To:     Damien Le Moal <Damien.LeMoal@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "hpa@...hat.com" <hpa@...hat.com>
Cc:     "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>
Subject: Re: [PATCH v4] libata: Add ATA_HORKAGE_NO_NCQ_ON_AMD for Samsung 860
 and 870 SSD.



On 01.09.21 08:13, Damien Le Moal wrote:
> On 2021/09/01 16:38, torvic9@...lbox.org wrote:
>> (Sorry for not doing a proper reply)
>>
>> Hello,
>> Noob here.
>> I have a Samsung 860 Pro connected to a AMD X570 chipset mainboard and
>> it just works flawlessly on 5.13 and 5.14.
>> Are you sure that *every* 860/870 is concerned by this problem on
>> *every* AMD controller? Isn't this too restrictive?
>> Or am I simply missing something?
> 
> Is you drive being initialized with NCQ enabled ?
> 
> cat /sys/block/sdX/device/queue_depth ?

Samsung 860 Pro:
$ cat /sys/block/sda/device/queue_depth


32

Samsung 860 Evo:
$ cat /sys/block/sdb/device/queue_depth


32

> 
>>
>> Thanks,
>> Tor
>>
> 
>