Re: A stuck system

From: Randall Stewart <rrs_at_cisco.com>
Date: Wed, 20 Dec 2006 11:12:34 -0500
Interesting.. I have actually been having
this problem for a while... can't remember
when I last updated.. its related to pounding
the network.. at least mine seems to  be... (I
am pounding the loopback).. and it appears
that everything just "freezes".

Is your machine a Gig-a-Byte motherboard?

R

Andre Guibert de Bruet wrote:
> 
> 
> On Dec 20, 2006, at 8:49 AM, Randall Stewart wrote:
> 
>> Ok, I was wrong on this... I recreated it.. hooked up
>> my em0 card to my laptop (right now its isolated
>> running the mpi tests and uses the loopback only).
>>
>> I do a ping
>>
>> And ta-da  the system comes back to life after
>> being hung for 15 minutes.
>>
>> This time I did not see any of the usual syslog messages
>> either... of course it was only "stuck" for 15 minutes or
>> so...
>>
>> I will leave the thing running and get it stuck again and
>> validate that the msk and usb will also cause the machine
>> to come back to life..
>>
>> Is there any way this could be a lost interupt type problem (remember
>> the scheduler is appearing to "stop" scheduling things). OR
>> is this a problem with my hardware... somehow failing to
>> deliver interupts maybe???
> 
> 
> I am seeing something similar on my dual Xeon system. It appears that  a 
> kernel from December 13th did not exhibit this behavior whereas one  
> from the 16th does. I am able to "revive" the machine by pushing traf  
> on the msk0 interface.
> 
> Kernel config: http://bling.properkernel.com/freebsd/BLING
> 
> Andy
> 
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-- 
Randall Stewart
NSSTG - Cisco Systems Inc.
803-345-0369 <or> 803-317-4952 (cell)
Received on Wed Dec 20 2006 - 15:15:15 UTC

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