Re: [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression

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Subject: Re: [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 24 Jun 2024 10:35:37 +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@xxxxxxxxxxxxxxx, 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
In-reply-to: <202406241546.6bbd44a7-oliver.sang@intel.com>
User-agent: Mutt/1.5.17 (2007-11-01)

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?

Follow-Ups:
- Re: [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression
  - From: Oliver Sang
- Re: [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression
  - From: Niklas Cassel

References:
- [axboe-block:for-next] [block] bd4a633b6f: fsmark.files_per_sec -64.5% regression
  - From: kernel test robot

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