Bug#704767: linux-image-2.6.32-5-amd64: kernel crashes when task block for more than 120 seconds

[Ben Hutchings <ben@decadent.org.uk>]

Control: reopen -1
Control: retitle -1 Kernel soft-lockup when running doxygen

On Fri, Apr 05, 2013 at 03:16:06PM -0400, Olivier Diotte wrote:
> Hi Ben,
> 
> I am pretty sure that running doxygen (high load) is related to this
> lockup, but based on your comment, maybe I am wrong.

So you're actually reporting the soft-lockup, not the response to it.

[...]
> root@Debianosaur:~# sysctl -a | grep lockup
> kernel.softlockup_panic = 0
> kernel.softlockup_thresh = 60
> 
> I don't remember ever changing this parameter, so I assume
> softlockup_panic was never enabled.

Indeed, this is not enabled by default as an uninterruptible sleep
for 120 seconds is sometimes OK.

[...]
> > Here is an example of what appears in kern.log when the system crashes:
[...]

The thing is, the kernel doesn't write to kern.log; the syslog daemon
does.  If you get a soft-lockup message in kern.log then it proves
the system was still somewhat responsive.

Please send the contents of /proc/meminfo.

Also, what filesystem and storage device were you using for the
doxygen source and output files?

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus