Re: [PATCH v3 0/4] test for XFS umount hang caused by the pending dquota log item in AIL

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On Thu, Nov 09, 2017 at 04:54:06PM +0800, Eryu Guan wrote:
> On Thu, Nov 09, 2017 at 03:32:48PM +0800, Hou Tao wrote:
> > Hi,
> > 
> > This is the v3 patchset for testing the XFS umount hang problem caused by
> > the pending dquota log item in AIL. The problem has not been fixed in
> > XFS yet, and Carlos Maiolino is working on it [1].
> > 
> > The bug that the test case can not reproduced on a 15GB scratch device
> > has been fixed, and many thanks to Eryu Guan. I had tested it on 4.14-rc8,
> > and the problem can be reproduced reliably now.
> > 
> > Comments and questions are welcome.
> 
> I finally could reproduce the hang, thanks a lot!
> 
> But I won't merge the test until the fix is upstream, otherwise it would
> interrupt all test runs on XFS.

Just FYI, I should have the patch ready soon, it already passes this test, I
just need to make sure I'm not screwing up with the locks.

> 
> And I have some nitpicks on individual patches :)
> 
> Thanks,
> Eryu
> 
> > 
> > Regards,
> > Tao
> > 
> > ---
> > Changes since v2:
> > 
> > v3:
> > * dmflakey: support error_writes feature for dm-flakey
> > 	* check the availability of error_writes by trial instead of version number
> > 
> > * xfs: test for umount hang caused by the pending dquota log item in AIL
> > 	* calculate log_ofs correctly by using convert cmd in xfs_db
> > 
> > * common/rc: factor out _scratch_xfs_[get|set]_sb_field
> > 	* reimplement _scratch_xfs_[get|set]_sb_field based on
> > 	  _scratch_xfs_[get|set]_metadata_field.
> > 
> > v2:
> > 	* http://www.spinics.net/lists/fstests/msg07792.html
> > 
> > v1:
> > 	* https://www.spinics.net/lists/fstests/msg07622.html
> > 
> > [1]: https://www.spinics.net/lists/linux-xfs/msg11614.html
> > 
> > Hou Tao (4):
> >   dmflakey: support multiple dm targets for a dm-flakey device
> >   dmflakey: support error_writes feature for dm-flakey
> >   xfs: test for umount hang caused by the pending dquota log item in AIL
> >   common/rc: factor out _scratch_xfs_[get|set]_sb_field
> > 
> >  common/dmflakey   |  29 +++++++++-
> >  common/fuzzy      |  33 -----------
> >  common/xfs        |  47 ++++++++++++++++
> >  tests/xfs/007     |   6 +-
> >  tests/xfs/098     |   4 +-
> >  tests/xfs/186     |   3 +-
> >  tests/xfs/199     |  13 ++---
> >  tests/xfs/307     |  11 +---
> >  tests/xfs/308     |  11 +---
> >  tests/xfs/339     |   6 +-
> >  tests/xfs/340     |   2 +-
> >  tests/xfs/999     | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/xfs/999.out |   2 +
> >  tests/xfs/group   |   1 +
> >  14 files changed, 257 insertions(+), 74 deletions(-)
> >  create mode 100755 tests/xfs/999
> >  create mode 100644 tests/xfs/999.out
> > 
> > -- 
> > 2.9.5
> > 
> > --
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-- 
Carlos
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