[wplug-bsd] Frequent page faults -- getting on my nerves

[Bill Moran]

Brandon Kuczenski <brandon at 301south.net> wrote:

> On Tue, 12 Apr 2005, Bill Moran wrote:
> 
> > Brandon Kuczenski <brandon at 301south.net> wrote:
> >> I've been running freeBSD 4.10 ("stable") since around August 1.  My
> 
> [snip]
> 
> >> Apr 11 20:06:14 ocean /kernel: Fatal trap 12: page fault while in kernel mode
> >> Apr 11 20:06:14 ocean /kernel: fault virtual address	= 0x0
> >> Apr 11 20:06:14 ocean /kernel: fault code		= supervisor read, page not present
> 
> [snip]
> 
> > If this is happening this often, you can debug the kernel.
> > First, subscribe to one of the FreeBSD developer lists.  Then update to the
> > current 4.x-STABLE (4.10 has been superceded by 4.11).  Then, follow the
> > instructions below to set up your system to debug the problem:
> >
> > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html
> >
> 
> This has started to happen often, and with other processes besides httpd. 
> Tonight it happened twice in twenty minutes when I was running GnuCash 
> over X11 tunneling (the first time, sshd was the process that choked; the 
> second time, guile) So I need to debug it.  I will do as you suggest, but 
> I don't really understand what exactly is meant by updating to the current 
> 4.x-STABLE release.  Is that the kernel?  Can I do that with sysinstall?

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/cutting-edge.html

If you have specific questions about the processs, give a holler.

Have you had a chance to run memtest on this machine for any length of time?
Frequent problems like that suggest buggy memory to me.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com