linux-kernel - Re: [PATCH] nvme/pci: Use Discard instead of Write Zeroes on SK hynix SC300

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Date:   Fri, 17 Apr 2020 19:25:06 +0000
From:   Chaitanya Kulkarni <Chaitanya.Kulkarni@....com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        "kbusch@...nel.org" <kbusch@...nel.org>,
        "axboe@...com" <axboe@...com>, "hch@....de" <hch@....de>,
        "sagi@...mberg.me" <sagi@...mberg.me>
CC:     "open list:NVM EXPRESS DRIVER" <linux-nvme@...ts.infradead.org>,
        linux-stable <stable@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] nvme/pci: Use Discard instead of Write Zeroes on SK hynix
 SC300

On 04/17/2020 01:37 AM, Kai-Heng Feng wrote:
> After commit 6e02318eaea5 ("nvme: add support for the Write Zeroes
> command"), SK hynix SC300 becomes very slow with the following error
> message:
> [  224.567695] blk_update_request: operation not supported error, dev nvme1n1, sector 499384320 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0]
>
> Use quirk NVME_QUIRK_DEALLOCATE_ZEROES to workaround this issue.
Can you share
nvme id-ctrl -H /dev/nvme0 | grep oncs -A 8
output?