linux-kernel - Re: [PATCH 2/8] KVM: MMU: set the dirty bit for the upper shadow page

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Message-ID: <20120109113005.GB5255@amt.cnet>
Date:	Mon, 9 Jan 2012 09:30:05 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	Avi Kivity <avi@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
	KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 2/8] KVM: MMU: set the dirty bit for the upper shadow page

On Fri, Dec 16, 2011 at 06:14:24PM +0800, Xiao Guangrong wrote:
> Upper page do not need to be tracked the status bit, it is safe to set the
> dirty and let cpu to happily prefetch it
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
> ---
>  arch/x86/kvm/mmu.c |   13 +++++--------
>  1 files changed, 5 insertions(+), 8 deletions(-)

Dirty bit is ignored in non-leaf pagetable entries.

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