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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 5B54EC6369E for ; Fri, 13 Nov 2020 10:40:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14A0322250 for ; Fri, 13 Nov 2020 10:40:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726397AbgKMKkv (ORCPT ); Fri, 13 Nov 2020 05:40:51 -0500 Received: from mx2.suse.de ([195.135.220.15]:39658 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726184AbgKMKkt (ORCPT ); Fri, 13 Nov 2020 05:40:49 -0500 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 DB395ABD1; Fri, 13 Nov 2020 10:40:47 +0000 (UTC) From: Vlastimil Babka To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alexander Potapenko , Kees Cook , Michal Hocko , David Hildenbrand , Mateusz Nosek , Laura Abbott , Vlastimil Babka , Mike Rapoport , "Rafael J. Wysocki" Subject: [PATCH v3 0/5] cleanup page poisoning Date: Fri, 13 Nov 2020 11:40:28 +0100 Message-Id: <20201113104033.22907-1-vbabka@suse.cz> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes since v2 [2] - rebase to next-20201113 - apply review feedback from David - acks from David and Rafael (thanks!) The first version was called "optimize handling of memory debugging parameters" [1], changes are: - apply review feedback - drop former Patch 3 - add new patches 3-5, change name and cover letter of series I have identified a number of issues and opportunities for cleanup with CONFIG_PAGE_POISON and friends: - interaction with init_on_alloc and init_on_free parameters depends on the order of parameters (Patch 1) - the boot time enabling uses static key, but inefficienty (Patch 2) - sanity checking is incompatible with hibernation (Patch 3) - CONFIG_PAGE_POISONING_NO_SANITY can be removed now that we have init_on_free (Patch 4) - CONFIG_PAGE_POISONING_ZERO can be most likely removed now that we have init_on_free (Patch 5) [1] https://lore.kernel.org/r/20201026173358.14704-1-vbabka@suse.cz [2] https://lore.kernel.org/linux-mm/20201103152237.9853-1-vbabka@suse.cz/ Vlastimil Babka (5): mm, page_alloc: do not rely on the order of page_poison and init_on_alloc/free parameters mm, page_poison: use static key more efficiently kernel/power: allow hibernation with page_poison sanity checking mm, page_poison: remove CONFIG_PAGE_POISONING_NO_SANITY mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO drivers/virtio/virtio_balloon.c | 4 +- include/linux/mm.h | 54 +++++++++------ include/linux/poison.h | 4 -- init/main.c | 2 +- kernel/power/hibernate.c | 2 +- kernel/power/power.h | 2 +- kernel/power/snapshot.c | 14 +++- mm/Kconfig.debug | 28 ++------ mm/page_alloc.c | 112 ++++++++++++++++---------------- mm/page_poison.c | 56 ++-------------- tools/include/linux/poison.h | 6 +- 11 files changed, 117 insertions(+), 167 deletions(-) -- 2.29.2