Subject: Re: kernel page fault trap
To: Rui Paulo <rpaulo@fnop.net>
From: Steve Blinkhorn <steve@prd.co.uk>
List: port-i386
Date: 03/17/2006 15:41:28
> 
> Steve Blinkhorn <steve@prd.co.uk> writes:
> 
> > Can someone interpret for me please.  One of my machines, running 2.0
> > GENERIC, has started to misbehave.   Sometimes it freezes when running
> > X.   Sometimes it throws an error during the boot process, of which
> > this is an example:
> >
> > kernel: page fault trap, code=0
> > Stopped at netbsd:Xdoreti+ox8a: mov0(%esp),%gs
> >
> > If it boots successfully, we don't seem to hit errors unless we run X.
> >
> > I have next to no experience of such errors in 25 years of running
> > Unix systems; my initial guess is there may be a fault in physical
> > memory.
> >
> > Any suggestions?
> 
> The backtrace from ddb would be useful. Try writing 'tr' at the ddb
> prompt.
> 
> -- 
>   Rui Paulo			<rpaulo@{NetBSD{,-PT}.org,fnop.net}>
> 
> 

Typically:

Xdoreti at netbsd: Xdoreti+0x8a
---interrupt---
0x30

But I am now getting more variety, including a:

---interrupt---
Bad frame pointer: 0xc0a78818
0x3431:

I also had a series of attempted boots where the device probe
sequence stopped with a long backtrace with references either to
a "hardclock" or what looked like  shorthand for the real-time
clock.

-- 
Steve Blinkhorn <steve@prd.co.uk>