Tyan k8sr lockups

Doug White dwhite at gumbysoft.com
Fri Apr 1 20:26:03 PST 2005

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

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

More information about the freebsd-amd64 mailing list