Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754276Ab0DAJIX (ORCPT ); Thu, 1 Apr 2010 05:08:23 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:62618 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754193Ab0DAJIP (ORCPT ); Thu, 1 Apr 2010 05:08:15 -0400 Message-ID: <4BB461E7.9000109@cn.fujitsu.com> Date: Thu, 01 Apr 2010 17:05:43 +0800 From: Xiao Guangrong User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Avi Kivity CC: Ingo Molnar , Marcelo Tosatti , Sheng Yang , KVM list , LKML Subject: Re: [RFC] KVM MMU: thinking of shadow page cache References: <4BB15B1A.7090901@cn.fujitsu.com> <4BB1FD69.6040409@redhat.com> In-Reply-To: <4BB1FD69.6040409@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 705 Lines: 21 Avi Kivity wrote: >> > > We've considered this in the past, it makes sense. The big question is > whether any guests actually map the same page table through PDEs with > different permissions (mapping the same page table through multiple PDEs > is very common, but always with the same permissions). Do you know of > any such guest? I also don't know whether have such guest. Maybe my idea is no good for current OS, thanks for your comments. Xiao -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/