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xen-devel
Re: [Xen-devel] L1[0x1fb] = 0000000000000000 which faults on one type of
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To: |
Jan Beulich <JBeulich@xxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] L1[0x1fb] = 0000000000000000 which faults on one type of machine but on another works? |
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From: |
Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> |
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Date: |
Thu, 17 Mar 2011 12:12:16 -0400 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, andrew.thomas@xxxxxxxxxx, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, keir.xen@xxxxxxxxx, swente@xxxxxxxxxxxxx, gianni.tedesco@xxxxxxxxxx |
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Thu, 17 Mar 2011 09:14:07 -0700 |
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<20110317155211.GA29603@xxxxxxxxxxxx> |
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<20110316221912.GA13035@xxxxxxxxxxxx> <4D81EF97020000780003706E@xxxxxxxxxxxxxxxxxx> <20110317155211.GA29603@xxxxxxxxxxxx> |
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Mutt/1.5.20 (2009-06-14) |
On Thu, Mar 17, 2011 at 11:52:12AM -0400, Konrad Rzeszutek Wilk wrote:
> On Thu, Mar 17, 2011 at 10:25:11AM +0000, Jan Beulich wrote:
> > >>> On 16.03.11 at 23:19, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > >>> wrote:
> > > But one thing I can't understand is why on one machine (IBM x3850)
> > > I get this crash, while another one with the same pagetable contents
> > > (L1 has nothing for 0x1fb) it works just fine? I added a panic and used
> > > the Xen hypervisor kdb to manually inspect the pagetable, and it has
> > > the same contents as the IBM x3850 -but it boots fine with this invalid
> > > value.
> > > Any ideas?
> >
> > Without seeing the full stack trace it's hard to tell. To me, it looks
> > like a mistake for native_apic_read() to be called at all under Xen,
> > and perhaps there's one lurking somewhere that gets hit only on
> > those IBM (Summit?) machines.
>
> That was it. When we bootup we call 'set_xen_basic_apic_ops' which
Forgot to mention it but thank you for steering me in the right direction!
The patches are in
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
for-2.6.32/bug-fixes
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