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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 5E2F9C433B4 for ; Wed, 12 May 2021 03:13:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C4F4361954 for ; Wed, 12 May 2021 03:13:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4F4361954 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EB0C16B0036; Tue, 11 May 2021 23:13:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E60AB6B006E; Tue, 11 May 2021 23:13:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CECC36B0070; Tue, 11 May 2021 23:13:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0225.hostedemail.com [216.40.44.225]) by kanga.kvack.org (Postfix) with ESMTP id B14E96B0036 for ; Tue, 11 May 2021 23:13:34 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 66DA8181AF5C6 for ; Wed, 12 May 2021 03:13:34 +0000 (UTC) X-FDA: 78131108748.13.F285BF1 Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) by imf17.hostedemail.com (Postfix) with ESMTP id 55FD640002D6 for ; Wed, 12 May 2021 03:13:28 +0000 (UTC) Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4Fg0D93P73zCrTC; Wed, 12 May 2021 11:10:49 +0800 (CST) Received: from [10.174.177.243] (10.174.177.243) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.498.0; Wed, 12 May 2021 11:13:29 +0800 Subject: Re: [PATCH v4 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() To: Mike Rapoport , Andrew Morton CC: Anshuman Khandual , Ard Biesheuvel , Catalin Marinas , "David Hildenbrand" , Marc Zyngier , Mark Rutland , Mike Rapoport , Will Deacon , , , , References: <20210511100550.28178-1-rppt@kernel.org> From: Kefeng Wang Message-ID: Date: Wed, 12 May 2021 11:13:28 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20210511100550.28178-1-rppt@kernel.org> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.177.243] X-CFilter-Loop: Reflected Authentication-Results: imf17.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=huawei.com; spf=pass (imf17.hostedemail.com: domain of wangkefeng.wang@huawei.com designates 45.249.212.35 as permitted sender) smtp.mailfrom=wangkefeng.wang@huawei.com X-Stat-Signature: xqmioqwcyrcxyfbn8egzytyd4d6warq1 X-Rspamd-Queue-Id: 55FD640002D6 X-Rspamd-Server: rspam02 Received-SPF: none (huawei.com>: No applicable sender policy available) receiver=imf17; identity=mailfrom; envelope-from=""; helo=szxga07-in.huawei.com; client-ip=45.249.212.35 X-HE-DKIM-Result: none/none X-HE-Tag: 1620789208-782879 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 2021/5/11 18:05, Mike Rapoport wrote: > From: Mike Rapoport > > Hi, > > These patches aim to remove CONFIG_HOLES_IN_ZONE and essentially hardwire > pfn_valid_within() to 1. > > The idea is to mark NOMAP pages as reserved in the memory map and restore > the intended semantics of pfn_valid() to designate availability of struct > page for a pfn. > > With this the core mm will be able to cope with the fact that it cannot use > NOMAP pages and the holes created by NOMAP ranges within MAX_ORDER blocks > will be treated correctly even without the need for pfn_valid_within. > > The patches are boot tested on qemu-system-aarch64. > > I beleive it would be best to route these via mmotm tree. Reviewed-by: Kefeng Wang