linux-kernel - Re: [PATCH v6 08/12] Handle async PF in a guest.

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Date:	Sun, 10 Oct 2010 15:22:52 +0200
From:	Gleb Natapov <gleb@...hat.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	kvm@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, hpa@...or.com,
	riel@...hat.com, cl@...ux-foundation.org, mtosatti@...hat.com
Subject: Re: [PATCH v6 08/12] Handle async PF in a guest.

On Sun, Oct 10, 2010 at 02:38:58PM +0200, Avi Kivity wrote:
>  On 10/10/2010 02:32 PM, Gleb Natapov wrote:
> >On Thu, Oct 07, 2010 at 03:10:27PM +0200, Avi Kivity wrote:
> >>   On 10/04/2010 05:56 PM, Gleb Natapov wrote:
> >>  >When async PF capability is detected hook up special page fault handler
> >>  >that will handle async page fault events and bypass other page faults to
> >>  >regular page fault handler. Also add async PF handling to nested SVM
> >>  >emulation. Async PF always generates exit to L1 where vcpu thread will
> >>  >be scheduled out until page is available.
> >>  >
> >>
> >>  Please separate guest and host changes.
> >>
> >Hmm. There are only guest changes here as far as I can see.
> 
> From the diffstat:
> 
> >  arch/x86/include/asm/kvm_para.h |   12 +++
> >  arch/x86/include/asm/traps.h    |    1 +
> >  arch/x86/kernel/entry_32.S      |   10 ++
> >  arch/x86/kernel/entry_64.S      |    3 +
> >  arch/x86/kernel/kvm.c           |  184 ++++++++++++++++++++++++++++++++++++++-
> >  arch/x86/kvm/svm.c              |   43 +++++++--
> 
> svm.c is host code.
> 
Not exactly :) It is a host code from nested guest perspective, but
guest code from L0 perspective.

--
			Gleb.
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