linux-kernel - Re: [PATCH v3 0/10] KVM MMU: allow more shadow pages become asynchronous

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Message-ID: <20100428171237.GF18168@amt.cnet>
Date:	Wed, 28 Apr 2010 14:12:37 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Avi Kivity <avi@...hat.com>, KVM list <kvm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/10] KVM MMU: allow more shadow pages become
 asynchronous

On Wed, Apr 28, 2010 at 11:54:31AM +0800, Xiao Guangrong wrote:
> Changlog v3:
> 
> Those changes all form Avi's suggestion, thanks.
> 
> - use smart way to fix the bug in patch 1
> - remove duplicates code in patch 5
> - check error code and fix forgot release page in patch 9
> - sync shadow pages in a batch instead of one by one
> 
> And, there is one TODO thing:
> Marker shadow page as unsync at create time avoid write-protect,
> this idea is from Avi:
> 
> |Another interesting case is to create new shadow pages in the unsync state.
> |That can help when the guest starts a short lived process: we can avoid write
> |protecting its pagetables completely
> 
> I'll send the patch out after this patchset applied.
>  
> Changlog v2:
> 
> - when level is PT_DIRECTORY_LEVEL, the 'offset' should be
>   'role.quadrant << 8', thanks Avi for point it out
> 
> - keep invlpg code in paging_tmpl.h address Avi's suggestion
> 
> - split kvm_sync_page() into kvm_sync_page() and kvm_sync_page_transient()
>   to clarify the code address Avi's suggestion

Applied, thanks.

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