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

[Brandon Kuczenski]

I've been running freeBSD 4.10 ("stable") since around August 1.  My 
longest uptime is about 30 days.  Every time there is a crash due to a 
page fault by a process associated with httpd.  At the time of the last 
crash, about an hour ago, apache was version 2.0.52_3.  I've since 
upgraded to the latest: 2.0.53_1, but in every case in the past, upgrading 
has not made the problem go away.

The error is always the same: "Fatal trap 12: page fault while in kernel 
mode" and the current process is always httpd.  I would have suspected 
hardware except that this has happened 5 times now and httpd has always 
been the current process.

My httpd.conf is nothing if not unremarkable -- I think I'm using the 
defaults for pretty much everything.  The only notable thing I can think 
of is that /usr/local/www/html is a symlink to /usr/local/www/data-dist, 
which I don't know if that's conventional or not.

Here's a sample of the entry in /var/log/messages:

Apr 11 20:06:14 ocean /kernel: 
Apr 11 20:06:14 ocean /kernel: 
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
Apr 11 20:06:14 ocean /kernel: instruction pointer	= 0x8:0xc169ba17
Apr 11 20:06:14 ocean /kernel: stack pointer	        = 0x10:0xd1907c34
Apr 11 20:06:14 ocean /kernel: frame pointer	        = 0x10:0xd1907c64
Apr 11 20:06:14 ocean /kernel: code segment		= base 0x0, limit 0xfffff, type 0x1b
Apr 11 20:06:14 ocean /kernel: = DPL 0, pres 1, def32 1, gran 1
Apr 11 20:06:14 ocean /kernel: processor eflags	= interrupt enabled, resume, IOPL = 0
Apr 11 20:06:14 ocean /kernel: current process		= 188 (httpd)
Apr 11 20:06:14 ocean /kernel: interrupt mask		= 
Apr 11 20:06:14 ocean /kernel: trap number		= 12
Apr 11 20:06:14 ocean /kernel: panic: page fault
Apr 11 20:06:14 ocean /kernel: 
Apr 11 20:06:14 ocean /kernel: syncing disks... 6 
Apr 11 20:06:14 ocean /kernel: done
Apr 11 20:06:14 ocean /kernel: Uptime: 8d22h56m44s
Apr 11 20:06:14 ocean /kernel: Automatic reboot in 15 seconds - press a key on the console to abort
.....

The only remarkable thing in httpd-error.log is a whole bunch of requests 
for mp3 files that once existed (but have since been removed) just before 
the crash.  I seem to remember that this is consistent with behavior 
around the other page faults too.

Is this something for the httpd list?  How do I go about finding more 
information?

Thanks in advance,
Brandon