linux-kernel - Re: [BUG] kvm: guest can not startup due to triple fault

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Message-ID: <4CBC4FA9.90406@redhat.com>
Date:	Mon, 18 Oct 2010 15:46:17 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Dave Young <hidave.darkstar@...il.com>
CC:	Jan Kiszka <jan.kiszka@....de>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] kvm: guest can not startup due to triple fault

  On 10/18/2010 03:45 PM, Dave Young wrote:
> On Mon, Oct 18, 2010 at 03:26:30PM +0200, Avi Kivity wrote:
> >   On 10/18/2010 02:58 PM, Dave Young wrote:
> >  >>
> >  >>   It's secondary_startup_64 enabling efer.sce and efer.nx.
> >  >>
> >  >>   Dave, please post your /proc/cpuinfo.  Is your host running with NX
> >  >>   disabled?
> >  >
> >  >I see nx bit in /proc/cpuinfo, Actually I don't know how to disable it.
> >
> >  Strange.
> >
> >  Please patch arch/x86/kvm/x86.c to printk efer_reserved_bits (a
> >  global), efer (an argument) and old_efer (a local), and post the
> >  results.
>
> I add printk before kvm_mmu_reset_context(vcpu), correct? get following value:
>

Add it at the beginning please, otherwise we'll miss the important one 
due to an early return.

-- 
error compiling committee.c: too many arguments to function

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