linux-kernel - Re: [linus:master] [filemap] 9aac777aaf: phoronix-test-suite.iozone.1MB.512MB.WritePerformance.mb

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Message-ID: <20240724144422.GA13505@lst.de>
Date: Wed, 24 Jul 2024 16:44:22 +0200
From: Christoph Hellwig <hch@....de>
To: kernel test robot <oliver.sang@...el.com>
Cc: Matthew Wilcox <willy@...radead.org>, oe-lkp@...ts.linux.dev,
	lkp@...el.com, linux-kernel@...r.kernel.org,
	Anna Schumaker <Anna.Schumaker@...app.com>,
	Christoph Hellwig <hch@....de>,
	Shaun Tancheff <shaun.tancheff@....com>,
	Sagi Grimberg <sagi@...mberg.me>, linux-fsdevel@...r.kernel.org,
	ying.huang@...el.com, feng.tang@...el.com, fengwei.yin@...el.com
Subject: Re: [linus:master] [filemap]  9aac777aaf:
 phoronix-test-suite.iozone.1MB.512MB.WritePerformance.mb_s -14.0%
 regression

On Wed, Jul 24, 2024 at 10:40:33PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed a -14.0% regression of phoronix-test-suite.iozone.1MB.512MB.WritePerformance.mb_s on:
> 
> 
> commit: 9aac777aaf9459786bc8463e6cbfc7e7e1abd1f9 ("filemap: Convert generic_perform_write() to support large folios")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

This is really weird as it shouldn't make a different for file systems
not using large folios.  What file system is this test run with?