From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F2ECC83000 for ; Tue, 28 Apr 2020 06:15:17 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2A930206B8 for ; Tue, 28 Apr 2020 06:15:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A930206B8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jTJWC-0006xE-UT; Tue, 28 Apr 2020 06:14:56 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jTJWC-0006x9-An for xen-devel@lists.xenproject.org; Tue, 28 Apr 2020 06:14:56 +0000 X-Inumbo-ID: 93d1ed02-8917-11ea-b9cf-bc764e2007e4 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 93d1ed02-8917-11ea-b9cf-bc764e2007e4; Tue, 28 Apr 2020 06:14:55 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E4800AECD; Tue, 28 Apr 2020 06:14:52 +0000 (UTC) Subject: Re: [PATCH 0/2] x86: high compat r/o M2P table handling adjustments From: Jan Beulich To: Andrew Cooper References: <91728ed9a191160e6405267f5ae05cb6d3724f22.1586352238.git.hongyxia@amazon.com> Message-ID: Date: Tue, 28 Apr 2020 08:14:46 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Hongyan Xia , xen-devel@lists.xenproject.org, julien@xen.org, Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On 15.04.2020 10:21, Jan Beulich wrote: > While looking at "x86_64/mm: map and unmap page tables in > destroy_compat_m2p_mapping" it occurred to me that the mappings > changed there can be dropped altogether, as can the linear > address range used for this. Note that both patches have only > been lightly tested so far, I guess in particular the 2nd one > may still have issues. > > 1: x86: drop unnecessary page table walking in compat r/o M2P handling > 2: x86: drop high compat r/o M2P table address range Just fyi - with the reviews I've got I'm intending to commit this later this week, unless I hear otherwise soon. Jan