Re: port-amd64/39283: Kernel crash on Dell Poweredge 2950

[David Holland <dholland-bugs%netbsd.org@localhost>]

On Mon, Aug 25, 2008 at 08:05:33AM +0200, fredrik%netbsd.se@localhost wrote:
 > >  My guess is a bad callout, but that doesn't narrow it down very much.
 > 
 > The machine has been running stable (with -1 in boot.cfg) for the last 21
 > days, with a lot of network, I/O and CPU load. What can we do to collect
 > more data to help the troubleshooting?

Probably the best thing to do is build a kernel with DIAGNOSTIC; and
on the conjecture that it may be a bad callout, add this patch, which
should cause it to panic in a recognizable way instead of crashing if
that's the problem.

Or it may panic somewhere else, if you weren't previously running a
DIAGNOSTIC kernel.

Then, wait for it to crash. :-/

Index: kern_timeout.c
===================================================================
RCS file: /cvsroot/src/sys/kern/kern_timeout.c,v
retrieving revision 1.41
diff -u -p -r1.41 kern_timeout.c
--- kern_timeout.c      2 Jul 2008 14:47:34 -0000       1.41
+++ kern_timeout.c      31 Aug 2008 22:26:51 -0000
@@ -722,6 +722,7 @@ callout_softclock(void *v)
                cc->cc_active = c;
 
                mutex_spin_exit(&cc->cc_lock);
+               KASSERT(func != NULL);
                if (!mpsafe) {
                        KERNEL_LOCK(1, NULL);
                        (*func)(arg);


-- 
David A. Holland
dholland%netbsd.org@localhost