Re: Bug#615998: linux-image-2.6.32-5-xen-amd64: Repeatable "kernel BUG at fs/jbd2/commit.c:534" from Postfix on ext4

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On Apr 04, 2011, at 10:24, Moffett, Kyle D wrote:
> On Apr 02, 2011, at 22:02, Ted Ts'o wrote:
>> Sorry for not following up sooner.  Are you still able to reproduce
>> this failure?  If I set up an identical Debian stable instance on
>> EC-2, am I likely to reproduce it myself?  Do you have a package list
>> or EC2 base image I can use as a starting point?
> 
> I'll need to check on this.
> 
> Unfortunately it was not a trivial process to install Debian "squeeze" onto an EC2 instance; it took a couple ugly Perl scripts, a patched Debian-Installer, and several manual post-install-but-before-reboot steps (like fixing up GRUB 0.99).  One of these days I may get time to update all that to the official "wheezy" release and submit bug reports.
> 
> I have an exact image of the failing instance, but it has proprietary data on it and if I stand up an old copy I need to be careful not to actually let it send all the queued emails :-D.
> 
> It's probably easier for me to halt email delivery and clone the working instance and try to reproduce from there.  If I recall, the (easily undone) workaround was to remount from "data=journal" to "data=ordered" on a couple filesystems.  It may take a day or two to get this done, though.
> 
> If it comes down to it I also have a base image (from "squeeze" as of 9 months ago) that could be made public after updating with new SSH keys.

Bah...

I went back to the old image that was crashing every boot before and I can't find any way to make it crash at all now...

If I manage to reproduce it again later I'll send you another email.

Cheers,
Kyle Moffett--
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