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Re: [Xen-devel] BUG: unable to handle kernel paging request - balloon_in

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] BUG: unable to handle kernel paging request - balloon_init - xen-4.1.0 -
From: Scott Garron <xen-devel@xxxxxxxxxxxxxxxxxx>
Date: Thu, 09 Jun 2011 16:04:23 -0400
Cc: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Jeremy Fitzhardinge <jeremy@xxxxxxxx>
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On 06/08/2011 03:29 PM, Konrad Rzeszutek Wilk wrote:
Can you do (while not having acpi=off) and using 'apic=debug' on you
 Linux line:

1). Run Ctrl-A couple of times and hit the '*' and send the output. I
am really curious to see what the IOAPIC thinks about the

2). Increase the dom0_mem= to say 1G?

     Ok, I've done these 2 things and the output is at:


     After changing dom0_mem to 1G instead of 512M, the machine hangs at
"Switching to clocksource xen" instead of "Trying to unpack rootfs image
as initramfs..."

     As an added step, I also recompiled the latest Mercurial pull of
xen-unstable.hg and am running with that instead of the one I had from a
month or so ago.  I'm not sure if that is what is making it not end up
with a Kernel OOPS/BUG message or if it is the apic=debug option.

     acpi=off is definitely not on the command line, now, though, and
it's not giving the OOPS that it was before.  It's just hanging/freezing.

3). Try the attached patch (not compile tested)

     I did not see an attachment on your last e-mail.

Scott Garron

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