A stuck system
John Baldwin
jhb at freebsd.org
Thu Dec 28 15:03:27 PST 2006
On Wednesday 20 December 2006 11:12, Randall Stewart wrote:
> 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?
Do you have a dual-port msk0 device?
> 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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> >
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>
--
John Baldwin
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