Re: kgdb 2.3 hangs

Hi Amit

I wonder how can I save all the log/printout from gdb? Thanks!

Ming



On Mon, 2006-01-30 at 12:26 +0530, Amit Kale wrote:
> Tom, Ming,
> 
> module debugging patch uses read memory packets, so it won't have any smp 
> issues.
> 
> Have you passed "nmi_watchdog=1" to kernel through grub.conf file? Please 
> also 
> check the output of dmesg, to confirm that NMI watchdog in deed works. If it 
> doesn't you'll see a message in dmesg output. If nmi_watchdog=1 doesn't work 
> try nmi_watchdog=2. (Yeah, seems like a joke, but that's exactly what it 
> is :-)
> 
> I see two different issues here.
> 
> 1. You could go ahead after turning off console messages over kgdb. This 
> should be required. I would like to see a dump of packets with this option 
> turned on. We'll get some idea about why this option is causing a problem.
> 
> I have seen a bug report earlier where console message packets got mixed up 
> with regular gdb packets, don't know how. Couldn't reproduce it later. I 
> think we should print a message from kgdb indicating that smp isn't working. 
> Perhaps halt kernel at that point.
> 
> 2. The output you have sent is rather limited. Could you send the _whole_ 
> output. That is right from the point where gdb prints it's initial version 
> no. etc. to the point where debugging fails.
> 
> -Amit
> 
> On Friday 27 Jan 2006 9:12 pm, Ming Zhang wrote:
> > On Fri, 2006-01-27 at 08:31 -0700, Tom Rini wrote:
> > > On Fri, Jan 27, 2006 at 10:12:46AM -0500, Ming Zhang wrote:
> > > > thanks for the hint.
> > > >
> > > > now i deselect the "console message over kgdb" and use this 'set debug
> > > > remote 1', the boot process is good.
> > > >
> > > >
> > > > now is another problem.
> > > >
> > > > it hangs when loading module.
> > >
> > > You need to have a custom compiled GDB with the patches found in CVS,
> > > if you've also got the 'module.patch' patch applied.
> >
> > i run the gdb_mod 2.3 from download page. i assumed that is the one you
> > mentioned.
> >
> > > But I'll admit I haven't tested module autoloading stuff on SMP, but it
> > > should work.
> >
> > though i am using a dual opteron, i already disabled SMP and choose P4
> > for a 32bit compilation.
> >
> > ming
> >
> >
> >
> >
> >
> >
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