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Re: [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression
- To: Oliver Sang <oliver.sang@xxxxxxxxx>
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Wed, 26 Jun 2024 08:18:04 +0200
- Cc: Christoph Hellwig <hch@xxxxxx>, oe-lkp@xxxxxxxxxxxxxxx, lkp@xxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>, Damien Le Moal <dlemoal@xxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, linux-m68k@xxxxxxxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, nbd@xxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-mmc@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, nvdimm@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, ying.huang@xxxxxxxxx, feng.tang@xxxxxxxxx, fengwei.yin@xxxxxxxxx
- Delivery-date: Wed, 26 Jun 2024 06:18:17 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Jun 26, 2024 at 02:11:11PM +0800, Oliver Sang wrote:
> hi, Christoph Hellwig,
>
> On Mon, Jun 24, 2024 at 10:35:37AM +0200, Christoph Hellwig wrote:
> > This is odd to say at least. Any chance you can check the value
> > of /sys/block/$DEVICE/queue/rotational for the relevant device before
> > and after this commit? And is this an ATA or NVMe SSD?
> >
>
> yeah, as Niklas mentioned, it's an ATA SSD.
>
> I checked the /sys/block/$DEVICE/queue/rotational before and after this
> commit,
> both show '0'. not sure if this is expected.
>
> anyway, I noticed you send a patch [1]
>
> so I applied this patch upon bd4a633b6f, and found the performance restored.
Thanks for testing!
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