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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT 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 40B16C433E0 for ; Fri, 26 Jun 2020 13:52:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21D1420663 for ; Fri, 26 Jun 2020 13:52:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728964AbgFZNwg (ORCPT ); Fri, 26 Jun 2020 09:52:36 -0400 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:44965 "EHLO out30-133.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728936AbgFZNwf (ORCPT ); Fri, 26 Jun 2020 09:52:35 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R981e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01422;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0U0lVmOA_1593179549; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U0lVmOA_1593179549) by smtp.aliyun-inc.com(127.0.0.1); Fri, 26 Jun 2020 21:52:29 +0800 From: Wei Yang To: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, yang.shi@linux.alibaba.com, vbabka@suse.cz, willy@infradead.org, thomas_os@shipmail.org, thellstrom@vmware.com, anshuman.khandual@arm.com, sean.j.christopherson@intel.com, aneesh.kumar@linux.ibm.com, peterx@redhat.com, walken@google.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, digetx@gmail.com, Wei Yang Subject: [RESEND Patch v2 0/4] mm/mremap: cleanup move_page_tables() a little Date: Fri, 26 Jun 2020 21:52:12 +0800 Message-Id: <20200626135216.24314-1-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org move_page_tables() tries to move page table by PMD or PTE. The root reason is if it tries to move PMD, both old and new range should be PMD aligned. But current code calculate old range and new range separately. This leads to some redundant check and calculation. This cleanup tries to consolidate the range check in one place to reduce some extra range handling. v2: * remove 3rd patch which doesn't work on ARM platform. Thanks report and test from Dmitry Osipenko Wei Yang (4): mm/mremap: format the check in move_normal_pmd() same as move_huge_pmd() mm/mremap: it is sure to have enough space when extent meets requirement mm/mremap: calculate extent in one place mm/mremap: start addresses are properly aligned include/linux/huge_mm.h | 2 +- mm/huge_memory.c | 8 +------- mm/mremap.c | 17 ++++++----------- 3 files changed, 8 insertions(+), 19 deletions(-) -- 2.20.1 (Apple Git-117)