linux-ext4 - Re: KVM-based xfstests appliance

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Message-ID: <4E8FE639.8030109@tao.ma>
Date:	Sat, 08 Oct 2011 13:57:13 +0800
From:	Tao Ma <tm@....ma>
To:	Ted Ts'o <tytso@....edu>
CC:	linux-ext4@...r.kernel.org
Subject: Re: KVM-based xfstests appliance

Hi Ted,
On 08/29/2011 09:32 PM, Ted Ts'o wrote:
> On Sun, Aug 28, 2011 at 07:54:37PM -0400, Ted Ts'o wrote:
>> Has anyone else noticed failures with xfstests #74?  What I'm finding
>> is that if compile the fstest program so that it is statically linked,
>> I can't get it to fail:
> 
> I've put up an my KVM-based xfstests appliance here:
> 
> ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/V-xfstests.tar.gz
It seems that this file is missing in the new ftp.kernel.org. Would you
mind upload it again or is there any other site that we can try to get it?

Thanks
Tao
> 
> Hopefully this will be useful for other people who are trying to do QA
> work for ext4.  I find it's much more convenient to test out a kernel
> by running "kvm-xfstests smoke", or "kvm-xfstests full".
> 
> BTW, I've found that the xfstests 74 test failure is very timing
> dependent.  It doesn't fail when I use another system which has faster
> disks than dm-crypt'ed laptop drives, and where writeback mode is
> enabled with lots of memory available for caching purposes.  It seems
> to require memory pressure and slower disks.  I should check and see
> whether it involves ext4_writepage() getting invoked out of the direct
> reclaim path...
> 
> 	     	     	    	      	  	  - Ted
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