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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84F40C433FE for ; Mon, 9 May 2022 06:39:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229962AbiEIGmh (ORCPT ); Mon, 9 May 2022 02:42:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233156AbiEIGdU (ORCPT ); Mon, 9 May 2022 02:33:20 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56F471882D1 for ; Sun, 8 May 2022 23:29:24 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id t11-20020a17090ad50b00b001d95bf21996so16157451pju.2 for ; Sun, 08 May 2022 23:29:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Q/ROXewp2cxt4q3Bz4z9TGgbOWGYmpSqNQy/66wnJeM=; b=Nd+Eloii8ZKgFxPbiLDEdOiwu9gNmv7JQhUlmY18jKXPbt8GZYA3VbL+0xQKqnO/rs K51O5M/mOEAHIdWaUS3TzAOe2e3rIHF2xCRpeoVqGQG8x3TyUC7H1Ku50uE2gi4opZMo M7jWGEOulU2tOo6bBHGlDVgFQkHdgx/knt8Xs2cQC0MWU+7HBSFD8XiqDOyGyrChyDib VDuUwsnoJA7BzYQtXPiNkbBN9NCnyJ5JZ1Mb4feFscvUpp3VVJwrSL1Q3obb5OABQZbK 3xtqpOUJpFYYR8AWZMuOoyrnfMzPvTGTLplK1T1ChNkqeyUzEOf6uwKDLO0mABCJtqxZ tV1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Q/ROXewp2cxt4q3Bz4z9TGgbOWGYmpSqNQy/66wnJeM=; b=dVU9egx+tFG3JheNoMg5PZcLyAtjKyVCIpWeNYqFRlyJ+ap+PaLMJn91EyXTKGAL9X DD9e3cP6C5EqDJHGBA6SBEpSHhEm5TcrD3knpuCsudOY+CXcA+XNpi1/619idZA1UaVK zwRIDtqa43Xebw7D3v/XRSIk31njF1mAA6FEh8lfBCqrk2X01IRzOx3Nte5rgDkU5v+N n4ezIxhWFHf2l8VI0xkksb377t4Ku24MDMsr3UC38b6NUBNIYLf/iwoOJJHfZMLZOsjk T1vBY5kxpBHJpzqQZRbkkhXOlHzCvOG+T8vDXK1wegrYaFhUCg+PxhMDkhEo5lcNlT4w iwvw== X-Gm-Message-State: AOAM531/6mu/9+iKSc8euZC1CD1rbgDo6yrb/VSclmbcUzhg6HuYmTos iLfLJyHtoYHljmb/JEUNooaCuA== X-Google-Smtp-Source: ABdhPJxwZiwU/4zQ7JSumL48lEGxXI7GAVzr7kAz6DKM+6n6aUS++edLr7xdJqjOjuqdGRPiyXaVUw== X-Received: by 2002:a17:90a:cf89:b0:1d7:7055:f49c with SMTP id i9-20020a17090acf8900b001d77055f49cmr17109634pju.12.1652077756422; Sun, 08 May 2022 23:29:16 -0700 (PDT) Received: from FVFYT0MHHV2J.bytedance.net ([139.177.225.250]) by smtp.gmail.com with ESMTPSA id k17-20020a170902ba9100b0015e8d4eb2c2sm6162001pls.268.2022.05.08.23.29.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 May 2022 23:29:16 -0700 (PDT) From: Muchun Song To: corbet@lwn.net, mike.kravetz@oracle.com, akpm@linux-foundation.org, mcgrof@kernel.org, keescook@chromium.org, yzaikin@google.com, osalvador@suse.de, david@redhat.com, masahiroy@kernel.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, duanxiongchun@bytedance.com, smuchun@gmail.com, Muchun Song Subject: [PATCH v10 0/4] add hugetlb_optimize_vmemmap sysctl Date: Mon, 9 May 2022 14:26:59 +0800 Message-Id: <20220509062703.64249-1-songmuchun@bytedance.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org This series is based on next-20220428. This series amis to add hugetlb_optimize_vmemmap sysctl to enable or disable the feature of optimizing vmemmap pages associated with HugeTLB pages. v10: - Collect Reviewed-by from Mike. - Remove hugetlb_optimize_vmemmap_enabled() check from hugetlb_optimize_vmemmap_pages() (Mike). - Add more explanation to Documentation/admin-guide/sysctl/vm.rst. - Fix cannot disable the feature via hugetlb_optimize_vmemmap sysctl (Mike). - Update patch 2's commit log (Mike). v9: - Go back to v3 since checking the size of struct page at config time is very complex. v8: - Fix compilation (scripts/selinux/mdp/mdp.c) error when CONFIG_SECURITY_SELINUX is selected. v7: - Fix circular dependency issue reported by kernel test robot. - Introduce CONFIG_HUGETLB_PAGE_HAS_OPTIMIZE_VMEMMAP instead of STRUCT_PAGE_SIZE_IS_POWER_OF_2. - Add more comments into vm.rst to explain hugetlb_optimize_vmemmap (Andrew). - Drop the patch "sysctl: allow to set extra1 to SYSCTL_ONE". - Add a new patch "use kstrtobool for hugetlb_vmemmap param parsing". - Reuse static_key's refcount to count the number of HugeTLB pages with vmemmap pages optimized to simplify the lock scheme. v6: - Remove "make syncconfig" from Kbuild. v5: - Fix not working properly if one is workig off of a very clean build reported by Luis Chamberlain. - Add Suggested-by for Luis Chamberlain. v4: - Introduce STRUCT_PAGE_SIZE_IS_POWER_OF_2 inspired by Luis. v3: - Add pr_warn_once() (Mike). - Handle the transition from enabling to disabling (Luis) v2: - Fix compilation when !CONFIG_MHP_MEMMAP_ON_MEMORY reported by kernel test robot . - Move sysctl code from kernel/sysctl.c to mm/hugetlb_vmemmap.c. Muchun Song (4): mm: hugetlb_vmemmap: disable hugetlb_optimize_vmemmap when struct page crosses page boundaries mm: memory_hotplug: override memmap_on_memory when hugetlb_free_vmemmap=on mm: hugetlb_vmemmap: use kstrtobool for hugetlb_vmemmap param parsing mm: hugetlb_vmemmap: add hugetlb_optimize_vmemmap sysctl Documentation/admin-guide/kernel-parameters.txt | 6 +- Documentation/admin-guide/sysctl/vm.rst | 39 +++++++++ include/linux/memory_hotplug.h | 9 ++ mm/hugetlb.c | 3 + mm/hugetlb_vmemmap.c | 105 ++++++++++++++++++++---- mm/memory_hotplug.c | 27 ++++-- 6 files changed, 165 insertions(+), 24 deletions(-) -- 2.11.0