Re: Freeze

From: Antony Mawer <fbsd-current_at_mawer.org>
Date: Fri, 19 Nov 2004 20:00:32 +1100
On 19/11/2004 6:59 PM, Peter Holm wrote:
> On Mon, Nov 15, 2004 at 03:46:15PM -0500, John Baldwin wrote:
>>On Friday 12 November 2004 07:33 am, Peter Holm wrote:
>>>GENERIC HEAD from Nov 11 08:05 UTC
>>>
>>>The following stack traces etc. was done before my first
>>>cup of coffee, so it's not so informative as it could have been :-(
>>>
>>>The test box appeared to have been frozen for more than 6 hours,
>>>but was pingable.
>>>
>>>http://www.holm.cc/stress/log/cons86.html
>>
>>A weak guess is that you have the system in some sort of livelock due to 
>>fork()?  Have you tried running with 'debug.mpsafevm=1' set from the loader?
> 
> OK, I've got some more info:
> 
> http://www.holm.cc/stress/log/cons88.html
> 
> Looks like a spin in uma_zone_slab() when slab_zalloc() fails?

I thought that sounded vaguely familiar -- not sure if it's relevant but 
I did see that Lukas (le_at_) had pointed to freezes that looked to be in 
the similar area (going off the backtrace he posted). I haven't looked 
into it at all but thought it might be relevant to someone looking at 
the issue:

http://docs.freebsd.org/cgi/getmsg.cgi?fetch=413571+0+current/freebsd-stable

Cheers
Antony
Received on Fri Nov 19 2004 - 08:00:23 UTC

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