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Date: Mon, 13 Feb 2012 17:12:58 -0500
From: Don Zickus <dzickus@redhat.com>
Subject: Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in
 crash path
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To: Yinghai Lu <yinghai@kernel.org>
Cc: linux-tip-commits@vger.kernel.org, mingo@elte.hu, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, ebiederm@xmission.com, hpa@zytor.com, akpm@linux-foundation.org, torvalds@linux-foundation.org, tglx@linutronix.de, vgoyal@redhat.com

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@redhat.com> 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. =A0Can you attach the .config you were using and=
 what
> > vendor you were using for Nehalem, Westmere and Sandybridge. =A0I'll tr=
y 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.

Cheers,
Don

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