On Mon, Jun 13, 2005 at 07:53:16PM +0000, Jacob Martin wrote:
> On Monday 13 June 2005 10:06 am, Andi Kleen wrote:
> > On Sun, Jun 12, 2005 at 03:29:50PM -0400, Jacob Martin wrote:
> > > Hardware memhole mapping never seems to work, or causes lockups right
> > > away. I need to test it further though.
> > >
> > > I have discovered that with the following features enabled:
> > >
> > > 1. Software memhole mapping
> > > 2. Continuous,
> > >
> > > linux sees the entire 4GB of memory. However, when things start getting
> > > requested from the upper half, there are Oopses generated. Attached are
> > > two Oopses that occurred under the test scenario described.
> >
> > What happens when you boot with numa=off or with numa=noacpi ?
>
> You got it! It seems to be working just fine without it compiled into the
> kernel.
Not compiled what in the kernel? I just wanted you to boot
the kernel with these options.
>
> > The system seems to believe it has memory in an area not covered
> > by mem_map.
>
> I think you hit it right on the head.
>
> I enabled NUMA because I had anticipated upgrading later. So I guess if you
> don't actually have NUMA set up hardware-wise, and enable this module, then
> you will have problems.
No, it should work fine in theory.
>
> Maybe a simple update to the kernel "K8 NUMA support" Processor feature's help
> section should be made to note this? Or, is there something that could be
> fixed somewhere. I wouldn't mind helping, it was baffling me for two weeks.
It is something that must be either fixed or workarounded (if it's a bug
in your BIOS, which is quite possible)
Can you send me the full dmesg from a numa boot again?
-Andi
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