Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

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On Mon, Feb 13, 2012 at 08:52:19AM -0800, Yinghai Lu wrote:
> On Mon, Feb 13, 2012 at 7:28 AM, Don Zickus <dzickus@xxxxxxxxxx> wrote:
> > On Sat, Feb 11, 2012 at 05:04:15PM -0800, Yinghai Lu wrote:
> >> >
> >> > v2: removed the disable lapic code too
> >>
> >> with this commit, kdump is not working anymore on my setups with
> >> Nehalem, Westmere, sandbridge.
> >> these setup all have VT-d enabled.
> >
> > Hi Yinghai,
> >
> > Thanks for the report.  Can you attach the .config you were using and what
> > vendor you were using for Nehalem, Westmere and Sandybridge.  I'll try to
> > reproduce it in my lab.
> Sure, please check attached one

Looks like I can reproduce the hang with my original patch and things work
when we stick the disable_local_APIC() back in there.  I'll keep poking.

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