Re: A stuck system

On Thu, Jan 04, 2007 at 06:33:13AM -0500, Randall Stewart wrote:
 > Ricardo Nabinger Sanchez wrote:
 > >On Fri, 29 Dec 2006 05:48:34 -0500
 > >Randall Stewart <rrs_at_cisco.com> wrote:
 > >
 > >>Nope... its just a single port, on-motherboard msk0.
 > >>
 > >>It does wake up though if I ping any interface...
 > >>
 > >>I suspect it might be a hardware problem.. not sure
 > >>yet :-0
 > >
 > >How about installing a ping trap in the device driver to generate a dump?
 > >What I mean is to, whenever the device driver receives a packet, it checks 
 > >if
 > >the packet is a special ping packet (with some specific data, like
 > >"dumpdump..." in the data field), and if so, forces a dump so you can check
 > >(luckily) where the system came from.
 > >
 > >It's a long shot, but perhaps it gives a hint.
 > >
 > >Does this behavior happens on IA-64 boxes?  If so, the kernel could set up
 > >the processor to save performance data (specifically the branch history), 
 > >and
 > >the special ping (or something else) could be used to print the branch 
 > >buffer
 > >history, instead of dumping a core.  Debugging symbols would be a must, I
 > >believe.
 > >
 > Well... the machine is only a p4d gigabit motherboard...
 > 
 > I am more and more suspecting a hardware problem.
 > 
 > There is a em card in the machine and the motherboard msk card.
 > The most recent update of the msk card seems to crash the system
 > at startup.. so I took it out of my load config.. have not
 > played with it yet..
 > 

Would you post backtrace information for msk(4)?
Btw, how about disabling MSI for msk(4)?
(loader tunable: hw.msk.msi_disable)

 > Previously I could ping the msk net.. and the machine would
 > wakeup.. now that I don't have the msk card.. guess what.. pinging
 > the em0 card DOES NOT wake the machine up..
 > 
 > I bet there is some foul-up on the motherboard  causing it to
 > not deliver interrupts until another one (on the mother board)
 > comes in... oh well..
 > 
 > R
 > 
 > -- 
 > Randall Stewart
 > NSSTG - Cisco Systems Inc.
 > 803-345-0369 <or> 803-317-4952 (cell)
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-- 
Regards,
Pyun YongHyeon