linux-kernel - Re: [PATCH v7 00/10] KVM: MMU: fast page fault

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Message-ID: <20120703151128.GA17302@amt.cnet>
Date:	Tue, 3 Jul 2012 12:11:28 -0300
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 v7 00/10] KVM: MMU: fast page fault

On Wed, Jun 20, 2012 at 03:56:29PM +0800, Xiao Guangrong wrote:
> Changlog:
> - always atomicly update the spte if it can be updated out of mmu-lock
> - rename spte_can_be_writable() to spte_is_locklessly_modifiable()
> - cleanup and comment spte_write_protect()
> 
> Performance result:
> (The benchmark can be found at: http://www.spinics.net/lists/kvm/msg73011.html)
> 
>                                before            after
> Run 10 times, Avg time:      538233957 ns.      249809853 ns. +53.6%

Looks fine to me. 

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