From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Subject: Re: [PATCH v2 07/16] KVM: MMU: introduce for_each_pte_list_spte
Date: Wed, 18 Apr 2012 18:03:10 +0800
Message-ID: <4F8E915E.2010705@linux.vnet.ibm.com>
References: <4F87FA69.5060106@linux.vnet.ibm.com> <4F87FC19.8080404@linux.vnet.ibm.com> <20120414114422.e3fe6e2abbfdcce61e6f69c8@gmail.com> <4F8B93B9.2030801@linux.vnet.ibm.com> <20120417234731.a19f270d5701b11ce95d13d4@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Cc: Avi Kivity <avi@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
To: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from e28smtp01.in.ibm.com ([122.248.162.1]:52619 "EHLO
	e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752424Ab2DRKD2 (ORCPT <rfc822;kvm@vger.kernel.org>);
	Wed, 18 Apr 2012 06:03:28 -0400
Received: from /spool/local
	by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted
	for <kvm@vger.kernel.org> from <xiaoguangrong@linux.vnet.ibm.com>;
	Wed, 18 Apr 2012 15:33:25 +0530
In-Reply-To: <20120417234731.a19f270d5701b11ce95d13d4@gmail.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

On 04/17/2012 10:47 PM, Takuya Yoshikawa wrote:

> On Mon, 16 Apr 2012 11:36:25 +0800
> Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:
> 
>> I tested it with kernbench, no regression is found.
> 
> Because kernbench is not at all good test for this.
> 
>> It is not a problem since the iter and spte should be in the cache.
> 
> I have checked dirty-log-perf myself with this patch [01-07].
> 
> GET_DIRTY_LOG for 1GB dirty pages has become more than 15% slower.


By the way, what is the case did you test? ept = 1 ?