Re: x2apic boot failure on recent sandy bridge system

[H. Peter Anvin]

On 10/19/2012 04:32 PM, Yinghai Lu wrote:
> On Fri, Oct 19, 2012 at 4:03 PM, Suresh Siddha
> <suresh.b.siddha@xxxxxxxxx> wrote:
> > On Fri, 2012-10-19 at 13:42 -0700, rrl125@xxxxxxxxx wrote:
> > > Any update? The messages just seem to have stopped months ago. A
> > > fallback would be nice, I have been booting the kernel with noa2xpic
> > > for since kernel 3.2, and currently I am working with 3.6.2.
> > >
> > > If needed I can try to attempt modifying the patch to include
> > > fallback, but I am probably not the best person to do it.
> >
> > Are you referring to this commit that made into the mainline tree
> > already?
> >
> > commit fb209bd891645bb87b9618b724f0b4928e0df3de
> > Author: Yinghai Lu <yinghai@xxxxxxxxxx>
> > Date:   Wed Dec 21 17:45:17 2011 -0800
> >
> >      x86, x2apic: Fallback to xapic when BIOS doesn't setup interrupt-remapping
>
> I think his system has DMAR table and cpu support x2apic, So kernel
> will switch to x2apic,
>
> but somehow BIOS SMI handler has problem with x2apic. should be thinkpad W520?

Right, StinkPad W520 needs a quirk.


--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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