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 90704C433E1 for ; Mon, 25 May 2020 21:44:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4E2DD2075F for ; Mon, 25 May 2020 21:44:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="EcayJDEB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E2DD2075F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EF8CB8005F; Mon, 25 May 2020 17:44:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EA90C8E0008; Mon, 25 May 2020 17:44:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DBF418005F; Mon, 25 May 2020 17:44:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0199.hostedemail.com [216.40.44.199]) by kanga.kvack.org (Postfix) with ESMTP id C4EFB8E0008 for ; Mon, 25 May 2020 17:44:15 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 8C6EC180AD815 for ; Mon, 25 May 2020 21:44:15 +0000 (UTC) X-FDA: 76856570070.05.scale02_806c427d3c52 X-HE-Tag: scale02_806c427d3c52 X-Filterd-Recvd-Size: 2728 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Mon, 25 May 2020 21:44:15 +0000 (UTC) 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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?