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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6933C433EF for ; Fri, 17 Jun 2022 08:26:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5D73C6B0074; Fri, 17 Jun 2022 04:26:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 55E256B0075; Fri, 17 Jun 2022 04:26:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3D7DE6B0078; Fri, 17 Jun 2022 04:26:30 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 28F416B0074 for ; Fri, 17 Jun 2022 04:26:30 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 057C780839 for ; Fri, 17 Jun 2022 08:26:30 +0000 (UTC) X-FDA: 79587046140.15.FCC729A Received: from mail-pj1-f52.google.com (mail-pj1-f52.google.com [209.85.216.52]) by imf19.hostedemail.com (Postfix) with ESMTP id E67801A008F for ; Fri, 17 Jun 2022 08:26:28 +0000 (UTC) Received: by mail-pj1-f52.google.com with SMTP id o7-20020a17090a0a0700b001ebad897457so2517222pjo.0 for ; Fri, 17 Jun 2022 01:26:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Yr0ixUanPwolWpl8lCaQhXzB90rLEzIJZVwDXXKPA0U=; b=T0JCgWDTB1C2DISDgdZ4UDVFOWnRp2zy2MnmauLXScjZ1nAwZFhugPqk7LJHr/ZqYR gS7AQ2LY7MCi12zojIG7f8Ph+i4IbqU+gY2wftHcxhfe5I/JxipjHT9G+VpC1zh5K6vU duBUQkQeO+lYH2S0APPy5npNumr73wIpqlOnbbnKsqaOmmaPmmMnefSyRGqfn72oeVHY 4XT/louGb1lBLYbfoesSgG/+I51syqllEu+lF2uvmS6543R3TVlllAbeuSojS2oaZNiz 0vsqAzWz7egUsoU66blaHOD0ko2YmWG/bFdUR0JWK3PFEfpAyeZtKbMvGonQ25pbr7g8 /rng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Yr0ixUanPwolWpl8lCaQhXzB90rLEzIJZVwDXXKPA0U=; b=rZGHcqLCsRSaykCzE/dlPDk16/P2YmUanq73hu+6oYtWXq/BagU8Iz/0Phn0EmBs84 z/vLjA3wEfep5k57xKS1LoulsBCoRO4VKlixzyCnIEzteQyfDR/ksHLubeo8NFQ+YCMG r5zVTGKr0Ub8RCecxt3XlhL40H8bSZvmvcpKKIVR/dfKWQ2iRXO8FVoFslmGQWxcWpwq sAz4JnB75Z2Isnhuc6y8lGXa7yYT9pl+O7C0/0yH+PGjIqVQHZxETdDJJJcyHKnDM6UP fLMdqgUVlYsZqeAbgcBLeuDMYZa+cn1f3T8vCCLFQnMW8cwzeyc2cQL0/dQlazgQEE5l TtNg== X-Gm-Message-State: AJIora8l7rfzatUiRGvo17Fk87G+nwgomLnI3F/iznhL+eO/KOfoDxYF 1XM0LyxjSvMCAQY9RJtojaj79Q== X-Google-Smtp-Source: AGRyM1t5yEL1BPz7y9ug30F37C0ubzhxM59TWM8YWNbgEGd6O1gO2tufJo02mvgvoeRwcOdvYuG/tA== X-Received: by 2002:a17:903:22cb:b0:167:992f:60c3 with SMTP id y11-20020a17090322cb00b00167992f60c3mr8629830plg.59.1655454387624; Fri, 17 Jun 2022 01:26:27 -0700 (PDT) Received: from localhost ([139.177.225.255]) by smtp.gmail.com with ESMTPSA id i12-20020a170902cf0c00b001677fa34a07sm2974542plg.43.2022.06.17.01.26.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jun 2022 01:26:27 -0700 (PDT) Date: Fri, 17 Jun 2022 16:26:23 +0800 From: Muchun Song To: Mike Kravetz Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Baolin Wang , Michal Hocko , Peter Xu , Naoya Horiguchi , James Houghton , Mina Almasry , "Aneesh Kumar K . V" , Anshuman Khandual , Paul Walmsley , Christian Borntraeger , catalin.marinas@arm.com, will@kernel.org, Andrew Morton Subject: Re: [PATCH 2/4] arm64/hugetlb: Implement arm64 specific hugetlb_mask_last_page Message-ID: References: <20220616210518.125287-1-mike.kravetz@oracle.com> <20220616210518.125287-3-mike.kravetz@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220616210518.125287-3-mike.kravetz@oracle.com> ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655454389; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Yr0ixUanPwolWpl8lCaQhXzB90rLEzIJZVwDXXKPA0U=; b=vr6UNYgLIXXM/vZj51Z3IDcdfGW69ny5sO0xOXsbDZREZud4s6RBUXCmJgTPH/DtCGKyr4 sFOMFSAh5ktGYMeR7dOsh2qQrigSL2vO4hKU8UNv9U4I1lILm6ag5yxOpQQAlGVldDVmXr J4wadYX6vWjttsAMCtBwmD1O+PB0xt4= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655454389; a=rsa-sha256; cv=none; b=OiFOoX5CvmMvFnxCrp6QbeBcrC3w8LwIOmnjqeGX9QIEMVlEuUY39L0Sdl7TGb9fnasQMj uVmwljwTsNDue8An8WYrhVqhnN1av9YudSpizdxku2DB1DMkj29dACaDHi7yaYw4e4/nck cPbWV/Q4tTA7mnEChWFvSgp8n7VTGUk= ARC-Authentication-Results: i=1; imf19.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=T0JCgWDT; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf19.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.216.52 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=T0JCgWDT; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf19.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.216.52 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: E67801A008F X-Stat-Signature: xk8j9776o1kta1c633sjdpecs6gwuiz1 X-HE-Tag: 1655454388-568685 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 Thu, Jun 16, 2022 at 02:05:16PM -0700, Mike Kravetz wrote: > From: Baolin Wang > > The HugeTLB address ranges are linearly scanned during fork, unmap and > remap operations, and the linear scan can skip to the end of range mapped > by the page table page if hitting a non-present entry, which can help > to speed linear scanning of the HugeTLB address ranges. > > So hugetlb_mask_last_page() is introduced to help to update the address in > the loop of HugeTLB linear scanning with getting the last huge page mapped > by the associated page table page[1], when a non-present entry is encountered. > > Considering ARM64 specific cont-pte/pmd size HugeTLB, this patch implemented > an ARM64 specific hugetlb_mask_last_page() to help this case. > > [1] https://lore.kernel.org/linux-mm/20220527225849.284839-1-mike.kravetz@oracle.com/ > > Signed-off-by: Baolin Wang > Signed-off-by: Mike Kravetz Acked-by: Muchun Song Thanks.