linux-kernel - Re: [PATCH v2 06/12] KVM: MMU: introduce a static table to map guest access to spte access

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Message-ID: <20130125001550.GB22875@amt.cnet>
Date:	Thu, 24 Jan 2013 22:15:50 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	Avi Kivity <avi.kivity@...il.com>, Gleb Natapov <gleb@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 06/12] KVM: MMU: introduce a static table to map guest
 access to spte access

On Wed, Jan 23, 2013 at 06:07:20PM +0800, Xiao Guangrong wrote:
> It makes set_spte more clean and reduces branch prediction
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
> ---
>  arch/x86/kvm/mmu.c |   37 ++++++++++++++++++++++++++-----------
>  1 files changed, 26 insertions(+), 11 deletions(-)

Don't see set_spte as being a performance problem?
IMO the current code is quite simple.



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