linux-kernel - Re: [lkp] [dcache_{readdir,dir_lseek}() users] 4e82901cd6: reaim.jobs_per

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Message-ID: <20160531134011.GB14480@ZenIV.linux.org.uk>
Date:	Tue, 31 May 2016 14:40:11 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	kernel test robot <xiaolong.ye@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: Re: [lkp] [dcache_{readdir,dir_lseek}() users] 4e82901cd6:
 reaim.jobs_per_min -49.1% regression

On Tue, May 31, 2016 at 04:15:15PM +0800, kernel test robot wrote:
> 
> 
> FYI, we noticed reaim.jobs_per_min -49.1% regression due to commit:
> 
> commit 4e82901cd6d1af21ae232ae835c36d8230c809e8 ("dcache_{readdir,dir_lseek}() users: switch to ->iterate_shared")
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> 
> in testcase: reaim
> on test machine: lkp-hsx04: 144 threads Brickland Haswell-EX with 512G memory
> with following parameters: cpufreq_governor=performance/iterations=4/nr_task=1600%/test=fserver

[snip]

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