From patchwork Wed Mar 30 10:25:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Wandun X-Patchwork-Id: 12795636 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 B6F3FC433FE for ; Wed, 30 Mar 2022 10:06:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 092358D0002; Wed, 30 Mar 2022 06:06:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 03FF18D0003; Wed, 30 Mar 2022 06:06:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DD40A8D0002; Wed, 30 Mar 2022 06:06:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.25]) by kanga.kvack.org (Postfix) with ESMTP id C97148D0001 for ; Wed, 30 Mar 2022 06:06:44 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay12.hostedemail.com (Postfix) with ESMTP id 92389120E3D for ; Wed, 30 Mar 2022 10:06:44 +0000 (UTC) X-FDA: 79300623528.09.E706AC7 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by imf07.hostedemail.com (Postfix) with ESMTP id 50E3B40004 for ; Wed, 30 Mar 2022 10:06:43 +0000 (UTC) Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.54]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4KT28p4jwGzDq8G; Wed, 30 Mar 2022 18:04:26 +0800 (CST) Received: from dggpemm500002.china.huawei.com (7.185.36.229) by dggpemm500022.china.huawei.com (7.185.36.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Wed, 30 Mar 2022 18:06:39 +0800 Received: from localhost.localdomain (10.175.112.125) by dggpemm500002.china.huawei.com (7.185.36.229) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Wed, 30 Mar 2022 18:06:39 +0800 From: Chen Wandun To: , , , Subject: [PATCH v2 0/2] fix several contiguous memmap assumptions Date: Wed, 30 Mar 2022 18:25:32 +0800 Message-ID: <20220330102534.1053240-1-chenwandun@huawei.com> X-Mailer: git-send-email 2.18.0.huawei.25 MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500002.china.huawei.com (7.185.36.229) X-CFilter-Loop: Reflected X-Stat-Signature: ewymiqiajjffpenpre4mzxrsb5qsu86w Authentication-Results: imf07.hostedemail.com; dkim=none; spf=pass (imf07.hostedemail.com: domain of chenwandun@huawei.com designates 45.249.212.188 as permitted sender) smtp.mailfrom=chenwandun@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 50E3B40004 X-HE-Tag: 1648634803-388085 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: v1 ==> v2: remove page_nth It isn't true for only SPARSEMEM configs to assume that a compound page has virtually contiguous page structs, so use nth_page to iterate each page. Inspired by: https://lore.kernel.org/linux-mm/20220204195852.1751729-8-willy@infradead.org/ Chen Wandun (2): mm: fix contiguous memmap assumptions about split page mm: fix contiguous memmap assumptions about alloc/free pages mm/compaction.c | 6 +++--- mm/huge_memory.c | 2 +- mm/page_alloc.c | 18 ++++++++++-------- 3 files changed, 14 insertions(+), 12 deletions(-)