"Fatal trap 12: page fault while in kernel mode" on 7.1/amd64, but not 7.0

[Kostik Belousov]

On Thu, Mar 05, 2009 at 07:55:30PM -0500, Boris Kochergin wrote:
> Ahoy. I recently upgraded an amd64 machine to 7.1-RELEASE, and started 
> getting a bunch of these at a pretty high frequency (a few hours to a 
> day apart):
> 
> http://acm.poly.edu/~spawk/IMG00033.jpg
> 
> The "current process" is always httpd. They're particularly annoying 
> because the machine doesn't actually ever reboot, requiring manual 
> intervention. Reverting the kernel back to 7.0 makes the panic go away, 
> and the machine had been happily running 7.0 for about a year 
> beforehand. I realize that the photo hardly contains any useful 
> debugging information, but I was hoping it might look familiar to 
> someone. If not, I guess I'll come back with a backtrace.

You need to provide the backtrace from kgdb.
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