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Date: Fri, 13 Dec 2024 15:32:24 +0100
From: Christoph Hellwig <hch@lst.de>
To: kernel test robot <oliver.sang@intel.com>
Cc: Christoph Hellwig <hch@lst.de>, oe-lkp@lists.linux.dev, lkp@intel.com,
	linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, virtualization@lists.linux.dev,
	linux-nvme@lists.infradead.org
Subject: Re: [linus:master] [block]  e70c301fae: stress-ng.aiol.ops_per_sec
 49.6% regression
Message-ID: <20241213143224.GA16111@lst.de>
References: <202412122112.ca47bcec-lkp@intel.com>
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On Thu, Dec 12, 2024 at 09:51:45PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed a 49.6% regression of stress-ng.aiol.ops_per_sec on:

This sounds like there is some other I/O path that still reorders,
which got messed up.  What storage driver is this using?  The repro
material talks about an ata disk, but I'm still curious if it's ahci
or some other driver, or a SAS HBA?