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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1EFBFC433E1 for ; Wed, 27 May 2020 01:06:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 05C41207CB for ; Wed, 27 May 2020 01:06:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728077AbgE0BG1 (ORCPT ); Tue, 26 May 2020 21:06:27 -0400 Received: from mail.loongson.cn ([114.242.206.163]:53104 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727852AbgE0BG0 (ORCPT ); Tue, 26 May 2020 21:06:26 -0400 Received: from [10.20.42.25] (unknown [10.20.42.25]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxr2vlvM1eQnI5AA--.327S3; Wed, 27 May 2020 09:05:41 +0800 (CST) Subject: Re: [PATCH v6 3/4] mm/memory.c: Add memory read privilege on page fault handling To: Andrew Morton References: <1590375160-6997-1-git-send-email-maobibo@loongson.cn> <1590375160-6997-3-git-send-email-maobibo@loongson.cn> <20200525144413.8c13559ec87616aa2c77af41@linux-foundation.org> Cc: Thomas Bogendoerfer , Jiaxun Yang , Huacai Chen , Paul Burton , Dmitry Korotin , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Stafford Horne , Steven Price , Anshuman Khandual , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Rapoport , Sergei Shtylyov , "Maciej W. Rozycki" , linux-mm@kvack.org, David Hildenbrand From: maobibo Message-ID: <4ca3c5b8-f695-c011-7e00-ef884a1c3d84@loongson.cn> Date: Wed, 27 May 2020 09:05:41 +0800 User-Agent: Mozilla/5.0 (X11; Linux mips64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <20200525144413.8c13559ec87616aa2c77af41@linux-foundation.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-CM-TRANSID: AQAAf9Dxr2vlvM1eQnI5AA--.327S3 X-Coremail-Antispam: 1UD129KBjvdXoW7XF1fWFykAF1kWFy7Cr1rJFb_yoW3JrbE9F 43Ca93Can5Kr97XayrKw4aqF4fGFyFyw1vqrWUX3ZFyFy8t3yDWa1jkrZxCF18tr9Yyry7 Arn0qa13Cr4avjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbaAYjsxI4VWkKwAYFVCjjxCrM7AC8VAFwI0_Xr0_Wr1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM2 8CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0 cI8IcVCY1x0267AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4j6F4UM28EF7xvwVC2z2 80aVCY1x0267AKxVW8JVW8Jr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IE w4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMc vjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvEwIxGrwACI402YVCY1x02628vn2kIc2xKxwCY jI0SjxkI62AI1cAE67vIY487MxkIecxEwVCm-wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4 IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJV WUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6rW3 Jr0E3s1lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8Jr UvcSsGvfC2KfnxnUUI43ZEXa7IU5q385UUUUU== X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/26/2020 05:44 AM, Andrew Morton wrote: > On Mon, 25 May 2020 10:52:39 +0800 Bibo Mao wrote: > >> Here add pte_sw_mkyoung function to make page readable on MIPS >> platform during page fault handling. This patch improves page >> fault latency about 10% on my MIPS machine with lmbench >> lat_pagefault case. >> >> It is noop function on other arches, there is no negative >> influence on those architectures. > > Acked-by: Andrew Morton > > Should I take these, or would the mips tree be preferred? I'm OK > either way, but probably the MIPS tree would be better? Thanks for reviewing again and again. This patch is based on mips-next, maybe MIPS tree will be better.