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Re: crash in xfs in current

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: crash in xfs in current
From: Reinoud Koornstra <reinoudkoornstra@xxxxxxxxx>
Date: Tue, 7 Jun 2016 17:40:03 -0600
Cc: Daniel Wagner <wagi@xxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx, viro@xxxxxxxxxxxxxxxxxx
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Hi Christoph,

Now my git log show this:

commit 555b67e4e729ca544bb4028ab12e532c68b70ddb
Merge: 544ad71 ad438c4
Author: Dave Chinner <david@xxxxxxxxxxxxx>
Date:   Fri May 20 10:34:00 2016 +1000

   Merge branch 'xfs-4.7-inode-reclaim' into for-next

commit 544ad71fc8e20fb3a6f50f00d487751492cd8409
Merge: 2a4ad58 e6b3bb7
Author: Dave Chinner <david@xxxxxxxxxxxxx>
Date:   Fri May 20 10:33:38 2016 +1000

   Merge branch 'xfs-4.7-error-cfg' into for-next

commit 2a4ad5894c819978dca5595396d54d51c3aca694
Merge: a7792aa 6e3e6d5
Author: Dave Chinner <david@xxxxxxxxxxxxx>
Date:   Fri May 20 10:33:17 2016 +1000

   Merge branch 'xfs-4.7-misc-fixes' into for-next

commit a7792aad644a259375002db8c9d9e03fd50bf509
Merge: 5b911354 3ab3ffc
Author: Dave Chinner <david@xxxxxxxxxxxxx>
Date:   Fri May 20 10:32:35 2016 +1000

Is this correct?
If so, let me build and test.
Building it already as we speak, but it would be nice if you could
confirm I'm actually testing the right thing.
Though, wouldn't it be good to repro and get a core file as well?
Or would the test of this commit narrow down the possibilities as well?
Thanks,

Reinoud.

On Tue, Jun 7, 2016 at 7:44 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Tue, Jun 07, 2016 at 12:52:39PM +0200, Daniel Wagner wrote:
>> >> I try to reproduce it on 4.6. My steps do not always trigger the crash.
>> >> So I can't be really sure if 4.6 doesn't show it, it does not happen.
>> >
>> > I have never been able to trigger this in 4.6 and it's my failsafe
>> > reboot (4.6.0).
>> > In 4.7-rc1 it's just a matter of time before I hit it.
>> > I do a lot of transactions, using git, extraction of tar.xz etc normally.
>>
>> This rings a bell. I though the lockperf tests triggered it. Before I
>> compiled a new kernel I did a 'git checkout' step.
>
> Thanks for testing this to both of you.  Can you try to build a kernel
> from git commit 555b67e4e729ca544bb4028ab12e532c68b70ddb - this is the
> XFS pull request that Dave sent to Linux for Linux 4.7-rc, so it has
> all the XFS changes relative to 4.6, but none of the others like the VFS
> changes.

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