[olug] kernel panics

[Ryan O'Rourke]

On Tue, 2003-06-03 at 10:20, Vincent wrote:
> You may want to modify syslog to also log to a remote system so you can get a copy of the error messages. 

So, just by making syslog log to a remote system I should end up with
kernel panic messages in /var/log/messages? Becuase I don't think I see
any my current messages log.


> ----- Original Message ----- 
> From: "Ryan O'Rourke" <ryano at ch-gifts.com>
> To: "Omaha Linux User Group" <olug at olug.org>
> Sent: Tuesday, June 03, 2003 10:00 AM
> Subject: Re: [olug] kernel panics
> 
> 
> > On Tue, 2003-06-03 at 09:50, Vincent wrote:
> > > That isn't much info to go on, but here are a couple standard things to try if you still have trouble after replacing the disk:
> > >
> > > First, make sure it reboots after a panic.  Add this to /etc/sysctl.conf:
> > > kernel.panic = 3    # System will reboot 3 seconds after a kernel panic
> > > To enable this now:
> > > echo "3" > /proc/sys/kernel/panic
> > >
> > > Next, try booting with each of these lilo (or grub) boot options and see if either helps:
> > >
> > > Disable machine checking.  This tells the kernel not to check the cpu's data structures.  The BIOS is probably already doing
> this
> > > anyway and two simultaneous checks can cause problems.
> > > append="root=LABEL=/ nomce"
> > >
> > > Disable apic.  This disables the use of IRQs above 15 (SMP or not).  Some hardware has trouble with APIC (Advanced Programmable
> > > Interrupt Control/ler)
> > > append="root=LABEL=/ noapic"
> > >
> > > Run a memory tester:  http://www.memtest86.com/
> >
> >
> > Thanks, Vincent. That's pretty much what I was looking for - some advice
> > on what to do when a panic happens and what to keep an eye out for to
> > solve the problem.
> > This one seemed particularly scary to me because of the numerous panics
> > at different times during boot, fsck, and uptime.
> >
> > I did find this little gem on O'Reilly's ONLamp.com about preparing a
> > FreeBSB machine to do a backtrace after a kernel panic to effectively
> > debug the problem.
> > Is there some way to do this in RedHat?
> > http://www.onlamp.com/pub/a/bsd/2002/03/21/Big_Scary_Daemons.html?page=1
> >
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> >
> 
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