Panic: sleeping thread

[Giovanni Trematerra]

On Tue, Apr 6, 2010 at 9:17 PM, Paul Halliday <paul.halliday at gmail.com> wrote:
> ---------- Forwarded message ----------
> From: Paul Halliday <paul.halliday at gmail.com>
> Date: Thu, Apr 1, 2010 at 8:38 AM
> Subject: Re: panic: sleeping thread
> To: questions at freebsd.org
>
>
> On Mon, Mar 22, 2010 at 9:28 AM, Paul Halliday <paul.halliday at gmail.com> wrote:
>> I have a couple VM's that randomly halt with this error:
>>
>> Sleeping thread (tid 10018, pid 1058) owns a non-sleepable lock
>> panic: sleeping thread
>> cpuid = 0
>> Uptime 11h14m31s
>> Cannot dump. Device not defined or unavailable.
>>
>> FreeBSD 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21 15:02:08 UTC
>> 2009     root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
>> amd64
>>
>> These systems run nightly Nessus scans and these halts are very
>> sporadic; I can go a week w/o seeing one.
>>
>> What should I do to start to troubleshoot this?

You might want to obtain a kernel dump.
Take a look at
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html

--
Gianni