[xfs-masters] [Bug 860] XFS filesystem crash

[bugzilla-daemon at oss.sgi.com]

http://oss.sgi.com/bugzilla/show_bug.cgi?id=860





--- Comment #5 from Carlos E. R. M. <carlos.e.r at opensuse.org>  2010-01-15 14:33:43 CST ---

(In reply to comment #4)
> (In reply to comment #3)
> 
> ...
> 
> > Thus it will have to be DM (although it only happens with encrypted xfs
> > partitions, not if they are reiserfs or ext3).
> 
> ext3, at least upstream, does not issue barriers by default, and as Dave said:
> 
> > This looks like a DM lockup. From the output of dmesg you posted,
> > we have a DM barrier flush waiting for completion:
> 
> so without barriers on you may not see the problem?

I delayed replying till I tested this. Indeed, mounting "nobarrier" avoids the
issue. I have replayed at least 12 times on 4 filesystems the operation that
caused the problem before (took 5 hours running), and it did not reproduce.
Thanks!


At least on openSUSE 11.2, it doesn't work in openSUSE 11.0: the issue has to
be different there.

In case somebody here has more ideas, I will attach the data I have from the
kernel log, after the lockup, and issuing "echo t > /proc/sysrq-trigger".

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