Tyan k8sr lockups

[Doug White]

On Fri, 1 Apr 2005, Gary Mu1der wrote:

> I have isolated the crash to the following dd command:
>
> 	dd if=/dev/mem of=/dev/null bs=1024k skip=4040 count=1

Reading from random places in /dev/mem will cause unpredicatable behavior.
Memory at that offset is in PCI memory-mapped device space, and reading
from there may disrupt the PCI bridge, enable or disable interrupts, or
worse.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org