From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Subject: Re: [PATCH 3/6] KVM MMU: optimize/cleanup for marking parent unsync
Date: Tue, 13 Apr 2010 09:53:07 +0800
Message-ID: <4BC3CE83.8020705@cn.fujitsu.com>
References: <4BC2D2E2.1030604@cn.fujitsu.com> <4BC2D390.7050708@cn.fujitsu.com> <20100412171211.GC4976@amt.cnet>
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Cc: Avi Kivity <avi@redhat.com>, KVM list <kvm@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
To: Marcelo Tosatti <mtosatti@redhat.com>
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Marcelo Tosatti wrote:

> Xiao,
> 
> Did you actually see this codepath as being performance sensitive? 

Actually, i not run benchmarks to contrast the performance before this patch
and after this patch.

> 
> I'd prefer to not touch it.

This patch avoids walk all parents and i think this overload is really unnecessary.
It has other tricks in this codepath but i not noticed? :-)

Thanks,
Xiao