Re: [discuss] [OOPS] powernow on smp dual core amd64

Andi Kleen
2005-06-13T22:52:26Z

> > Unfortunately, after starting cpuspeed daemon, I get this:
>
> It looks like it's happening sometime after cpuspeed starts.
> Could you disable cpuspeed and see if the problem still
> occurs?

If anything it must be something in the kernel (except someone
does very strange stuff in /dev/mem)

>
> > Starting cpuspeed: [ OK ]
> > Starting pcmcia: Starting PCMCIA services:
> > CPU 6: Machine Check Exception: 4 Bank 4:
> > b200000000070f0f
> > TSC 4129a3d70d
>
> > Code: Bad RIP value.
> > RIP [<00000000000000ff>] RSP <ffff81003fe63fa0>
> > CR2: 00000000000000ff
> > <0>Kernel panic - not syncing: Oops
>
> Andi said that "Something tried to access a physical memory
> address that was not mapped in the CPU." Andi, is this
> related to the bug that you thought might have been fixed
> in 2.6.12-rc6-git4?

No, I don't think so. In that bug something would be mapped
twice, not nothing. Also nobody reported watchdog timeouts
for that one.

-Andi