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Re: [Xen-devel] BUG: unable to handle kernel paging request - balloon_init - xen-4.1.0 -

On Mon, Jun 06, 2011 at 05:33:02PM -0400, Scott Garron wrote:
> On 06/06/2011 03:17 PM, Pasi Kärkkäinen wrote:
> >Did you try konrad/xen.git xen/stable-2.6.39.x branch?
>      I hadn't until you suggested it and did just now.  That one crashes
> in a different spot.  The full serial output is here:
> http://www.pridelands.org/~simba/xen-debug/hailstorm-fullserial20110606.txt
> [    2.026893]  [<ffffffff816117a1>] ? retint_restore_args+0x5/0x6

> [    2.026902]  [<ffffffff812a1ef8>] ? acpi_os_execute_deferred+0x2c/0x31
> [    2.026910]  [<ffffffff812a1e4c>] ? acpi_os_write_port+0xe/0x2b
> [    2.026922]  [<ffffffff812ba8ae>] ? acpi_hw_write_port+0x3e/0x94
> [    2.026931]  [<ffffffff81028c4e>] ? pvclock_clocksource_read+0x48/0xb1
> [    2.026939]  [<ffffffff81611a15>] page_fault+0x25/0x30
> [    2.026947]  [<ffffffff812a1ef8>] ? acpi_os_execute_deferred+0x2c/0x31

That looks very similar to some previous bugs where the ACPI DSDT
was trying to write to the IOAPIC to set pins or such. Hmm, the way
we "fixed" it was looking at the disassembled DSDT and removing
the offending write. You can look in the archive for ACPI DSDT and look
for emails from Jan Beulich - he found the culprit.

But this might be also something else. Did you try to boot with 'acpi=off'
just to see if ti gets past this. It might hang on something else with
that option sadly :-(

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