From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: windows 2008 guest causing rcu_shed to emit NMI
Date: Thu, 24 Jan 2013 10:20:45 -0200
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To: Andrey Korolyov <andrey@xdel.ru>
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On Thu, Jan 24, 2013 at 01:54:03PM +0300, Andrey Korolyov wrote:
> Thank you Marcelo,
> 
> Host node locking up sometimes later than yesterday, bur problem still
> here, please see attached dmesg. Stuck process looks like
> root     19251  0.0  0.0 228476 12488 ?        D    14:42   0:00
> /usr/bin/kvm -no-user-config -device ? -device pci-assign,? -device
> virtio-blk-pci,? -device
> 
> on fourth vm by count.
> 
> Should I try upstream kernel instead of applying patch to the latest
> 3.4 or it is useless?

If you can upgrade to an upstream kernel, please do that.