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Date:	Wed, 12 Sep 2012 18:01:01 -0500
From:	Eric Sandeen <>
To:	Brad Figg <>
CC:, xfs-oss <>
Subject: Re: Ubuntu Ext4 regression testing

Hi Brad -

(cc: xfs list too)

On 9/12/12 5:52 PM, Brad Figg wrote:
> The Ubuntu kernel team has been putting some automated testing
> infrastructure in place. We are very interested in engaging with
> the appropriate upstream developers. We have been running the
> xfstests that come as part of the autotest testing framework.
> Some of these tests fail or never complete when run against an
> Ext4 file-system. 

Which ones?  Feel free to file bugs or send mail.  Tests should pass.
Sometimes it's a test bug, though, of course ;)

> Our initial questions are:
> 1. Is this an appropriate set of tests to be run as regression
>    tests?

Yes, that's what it's for!

> 2. Is there a list of the xfstests that are appropriate for
>    Ext4?

Any test which says

_supported_fs generic
_supported_fs ext4

can run on ext4, and should in theory pass.  I think there are
about 100 of them by now.

There is a "dangerous" group (see groups file) which contains test nrs that
might stop testing via a hang or panic.  But don't skip those by
default; newer kernels with those bugs fixed _should_ pass them too.

> 3. Are there additional regression tests that would be beneficial
>    to the Linux community for us to be running?

We've been encouraging new tests to be written for xfstests lately,
and it's gotten a good amount of traction.  There certainly may be
other things out there, though.


> Test results can be found at:
> Thanks
> Brad

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