Re: [RFC v2] [PATCH 0/10] DAX page fault locking

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On Tue, 2016-03-22 at 13:32 -0600, Ross Zwisler wrote:
> On Mon, Mar 21, 2016 at 02:22:45PM +0100, Jan Kara wrote:
> > [Sorry for repost but I accidentally sent initial email without
> > patches]
> > 
> > Hello,
> > 
> > this is my second attempt at DAX page fault locking rewrite. Things now
> > work reasonably well, it has survived full xfstests run on ext4. I
> > guess I need to do more mmap targetted tests to unveil issues. Guys
> > what do you used for DAX testing?
> 
> I typically use xfstests for regression testing.  If we can come up with
> new generally useful regression tests, especially ones concerning mmap
> races, that would be awesome.  I guess it's just a choice between adding
> them somewhere in xfstests or somewhere else like with the unit tests in
> ndctl.

Brian Boylston wrote a test for mmap race conditions and posted it before.
 This test was very useful to fix the data corruption issue we had before.
http://www.spinics.net/lists/linux-ext4/msg49876.html

If there is anything we can do to make this test useful as regression
tests?

Thanks,
-Toshi

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