linux-kernel - Re: [PATCH 3/6] KVM MMU: optimize/cleanup for marking parent unsync

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Message-ID: <4BC2DFEC.5020204@cn.fujitsu.com>
Date:	Mon, 12 Apr 2010 16:55:08 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	KVM list <kvm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/6] KVM MMU: optimize/cleanup for marking parent unsync



Avi Kivity wrote:
> On 04/12/2010 11:02 AM, Xiao Guangrong wrote:
>> - 'vcpu' is not used while mark parent unsync, so remove it
>> - if it has alread marked unsync, no need to walk it's parent
>>
>>    
> 
> Please separate these two changes.
> 
> The optimization looks good.  Perhaps it can be done even nicer using
> mutually recursive functions (mmu_parent_walk calls mmu_parent_walk_fn
> which calls mmu_parent_walk on the parent), but let's not change too
> many things at a time.

OK, i'll separate it in the next version

Thanks,
Xiao
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