Kernel crashes in seconds in quota is on on ext4 and nfs4

[Krzysztof Leszczyński]

We got server with a single nfs export mounted on /export/0 (ext4,usrquota,grpquota)
It crashes just after nfsd is started if quota is on. If the export is mounted without usrquota,grpquota it runs smoothly.
The filesystem is clean (fsck -f detected nothing) and the filesystem is filled 13% (107G/735G).
It crashed 2-3 times, then I switched off quota and mounted /export just before starting nfs. Now it's been working smoothly for few hours but I'm pretty sure it would crash immediately after starting quota.

Before the first crash it's been working for 2 days but then it crashed seconds after staring nfsd.

Attaching the captured log.

# uname -a
Linux lsd 2.6.32-22-server #36-Ubuntu SMP Thu Jun 3 20:38:33 UTC 2010 x86_64 GNU/Linux

# cat /proc/version_signature
Ubuntu 2.6.32-22.36-server 2.6.32.11+drm33.2

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-virtual 2.6.32-22.36
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.36-server 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-server x86_64
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
Date: Tue Jun 22 11:23:42 2010
InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1:
ProcCmdLine: root=LABEL=hostnameroot ro nomodeset
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
SourcePackage: linux

[Krzysztof Leszczyński (chris-lesz)]

After the server crashed for the first time I started it and it crashed immediatelly but this time the bugs were different
It crashed after 160 seconds because this time was consumed by quotacheck before starting nfs.

[Jeremy Foshee (jeremyfoshee)]

Hi Krzysztof,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

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[Krzysztof Leszczyński (chris-lesz)]

3 days ago I rebooted the machine with mainline kernel:
2.6.34-020634-generic #020634 SMP Mon May 17 19:27:49 UTC 2010 x86_64 GNU/Linux
and it works without any single failure. With the latest ubuntu-server 2.6.32 it crashed within few seconds after starting nfsd.

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu development release http://cdimage.ubuntu.com/daily-live/current/ . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]