linux-kernel - Re: [PATCH] KVM: MMU: fix the condition of syncing a new shadow page

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Message-ID: <4EA517D7.6060407@qq.com>
Date:	Mon, 24 Oct 2011 15:46:31 +0800
From:	Xiao Guangrong <xiao.guangrong@...com>
To:	Zhao Jin <cronozhj@...il.com>
CC:	avi@...hat.com, mtosatti@...hat.com, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH] KVM: MMU: fix the condition of syncing a new shadow page

On 2011/10/24 15:21, Zhao Jin wrote:
> Should be "or" since a new shadow page is synced if either it is
> not leaf or there already exists another unsync shadow page with 
> the same gfn.
> 

It is obviously wrong, we need to sync pages only if it has unsync page
*and* the new shadow page breaks the unsync rule(only the level 1 sp can
became unsync).
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