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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 BD166C433DF for ; Mon, 25 May 2020 21:44:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 969B22075F for ; Mon, 25 May 2020 21:44:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590443055; bh=Nqbaxgpvx5uyazgnzFeWBQQFly0LKrKypsDhmFo/xlc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=u3V1zLhWG1d8wZrf+zYkX6EvXrENCj4XJ7HwHwmgLb1V6aCbALLdxTkHc1Mu0hXhd MI0a9bI2BOFUOIJZ+sJRsK2WJtkteROL5QVPuSZ8Ot40tLDfo7zScdSGb9Ao0ewlqp oe858yJYtlQuJ7uMlqXmte7TB7koQ1rxK9h+9gS4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388613AbgEYVoP (ORCPT ); Mon, 25 May 2020 17:44:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:47028 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388279AbgEYVoO (ORCPT ); Mon, 25 May 2020 17:44:14 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8F181206C3; Mon, 25 May 2020 21:44:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590443054; bh=Nqbaxgpvx5uyazgnzFeWBQQFly0LKrKypsDhmFo/xlc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=EcayJDEBS4en947dek/H2KlOkLO6wCO+VdOmh/QJCziXLYUizbKCcBOSnvUEcxZRy Hu+gcJ2Bfy2DHs+pQ7gslA88Sw24TmUtoKUIi27UGT7gR+p86Nxlj7cpbVQCBfeP0d R4eQxu52iUf5wFYdwAzgc+VZJF2bbZ/sjVZqMkMY= Date: Mon, 25 May 2020 14:44:13 -0700 From: Andrew Morton To: Bibo Mao Cc: Thomas Bogendoerfer , Jiaxun Yang , Huacai Chen , Paul Burton , Dmitry Korotin , Philippe =?ISO-8859-1?Q?Mathieu-Daud=E9?= , 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 Subject: Re: [PATCH v6 3/4] mm/memory.c: Add memory read privilege on page fault handling Message-Id: <20200525144413.8c13559ec87616aa2c77af41@linux-foundation.org> In-Reply-To: <1590375160-6997-3-git-send-email-maobibo@loongson.cn> References: <1590375160-6997-1-git-send-email-maobibo@loongson.cn> <1590375160-6997-3-git-send-email-maobibo@loongson.cn> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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?