Kernel panics running 5.4-RC3 and 5.4-STABLE on an AMD-64 with 8GB RAM

David O'Brien obrien at
Tue Apr 26 09:58:43 PDT 2005

On Mon, Apr 25, 2005 at 08:48:26PM +0400, Diomidis Spinellis wrote:
> I am trying to make a Tyan S4882 (K8QSPro) motherboard with two 2.2GHz 
> Opterons and 8GB RAM to work with FreeBSD.  Both the 5.4-RC3 
> installation boot disk, and Thursday's 5.4-STABLE code panic.  The 
> system works fine with 4GB of RAM (it can run make buildworld), either 
> by physically removing the memory, or by adding "set hw.physmem = 4GB" 
> in boot/loader.rc.

What BIOS version are you using, and what are your BIOS settings for
memory related things?  Do you have "Hardware memory hole" or "Software
memory hole" enabled?  Can use the full 8GB fine if you use "Failsafe
defaults"?  If you use "Optimial defaults"?

-- David  (obrien at

More information about the freebsd-amd64 mailing list