From patchwork Tue Mar 9 17:41:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oscar Salvador X-Patchwork-Id: 12126217 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 B5B9BC433E0 for ; Tue, 9 Mar 2021 17:41:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5F04265215 for ; Tue, 9 Mar 2021 17:41:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5F04265215 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id F40DC8D0123; Tue, 9 Mar 2021 12:41:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id EA26E8D007F; Tue, 9 Mar 2021 12:41:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D45BD8D0123; Tue, 9 Mar 2021 12:41:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0140.hostedemail.com [216.40.44.140]) by kanga.kvack.org (Postfix) with ESMTP id B8AE28D007F for ; Tue, 9 Mar 2021 12:41:37 -0500 (EST) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 5437752B7 for ; Tue, 9 Mar 2021 17:41:37 +0000 (UTC) X-FDA: 77901053034.04.4DAAD25 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf26.hostedemail.com (Postfix) with ESMTP id 85FCC40B8CCF for ; Tue, 9 Mar 2021 17:41:18 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E769DAC1F; Tue, 9 Mar 2021 17:41:18 +0000 (UTC) From: Oscar Salvador To: Andrew Morton Cc: David Hildenbrand , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador Subject: [PATCH v5 0/4] Cleanup and fixups for vmemmap handling Date: Tue, 9 Mar 2021 18:41:09 +0100 Message-Id: <20210309174113.5597-1-osalvador@suse.de> X-Mailer: git-send-email 2.13.7 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 85FCC40B8CCF X-Stat-Signature: ifrmaoxnfo1wp7grcc4hifyd7h4jax4z Received-SPF: none (suse.de>: No applicable sender policy available) receiver=imf26; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: none/none X-HE-Tag: 1615311678-96239 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: Hi, this series contains cleanups to remove dead code that handles unaligned cases for 4K and 1GB pages (patch#1 and patch#2) when removing the vemmmap range, and a fix (patch#3) to handle the case when two vmemmap ranges intersect the same PMD. More details can be found in the respective changelogs. v4 -> v5: - Rebase on top of 5.12-rc2 - Addessed feedback from Dave - Split previous patch#3 into core-changes (current patch#3) and the optimization (current patch#4) - Document better what is unused_pmd_start and its optimization - Added Acked-by for patch#1 v3 -> v4: - Rebase on top of 5.12-rc1 as Andrew suggested - Added last Reviewed-by for the last patch v2 -> v3: - Make sure we do not clear the PUD entry in case we are not removing the whole range. - Add Reviewed-by v1 -> v2: - Remove dead code in remove_pud_table as well - Addessed feedback by David - Place the vmemap functions that take care of unaligned PMDs within CONFIG_SPARSEMEM_VMEMMAP Oscar Salvador (4): x86/vmemmap: Drop handling of 4K unaligned vmemmap range x86/vmemmap: Drop handling of 1GB vmemmap ranges x86/vmemmap: Handle unpopulated sub-pmd ranges x86/vmemmap: Optimize for consecutive sections in partial populated PMDs arch/x86/mm/init_64.c | 198 +++++++++++++++++++++++++++++++------------------- 1 file changed, 124 insertions(+), 74 deletions(-)