From patchwork Thu May 12 04:11:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12847007 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 9175EC433F5 for ; Thu, 12 May 2022 04:12:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DA7D16B0074; Thu, 12 May 2022 00:12:12 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D552F6B0075; Thu, 12 May 2022 00:12:12 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BF60E6B0078; Thu, 12 May 2022 00:12:12 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id B17296B0074 for ; Thu, 12 May 2022 00:12:12 -0400 (EDT) Received: from smtpin24.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 7DF883167E for ; Thu, 12 May 2022 04:12:12 +0000 (UTC) X-FDA: 79455768504.24.79C8871 Received: from mail-pf1-f180.google.com (mail-pf1-f180.google.com [209.85.210.180]) by imf23.hostedemail.com (Postfix) with ESMTP id 4731D1400A4 for ; Thu, 12 May 2022 04:11:57 +0000 (UTC) Received: by mail-pf1-f180.google.com with SMTP id x52so3676610pfu.11 for ; Wed, 11 May 2022 21:12:10 -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=HQnzlDikKOsDxf1h8spRLU9TXxPUqNDKctkg19RVkFM=; b=StMBboIsOvYwncuvyeTg7rPeTafDz8G7/dg30myGJeamyQj3Dadv3p7IdQXVIjaujj 0liZkhXgA84gzeXvYO1yqN+8lTKkDa3VKlFRNoEUMhEZRz8VT6gNZs8Ot4RWKt46LuUr L2Z/g0YxiH0dpLkq4LY95B4pJNHatPStdR/LFpkJmzjbHfQ9PhjdnK8AzGG7pKuELqqq myXRGfAuerWOFPsas0Cvhvmro0zNlkJ8jbWxY9GDyDRoH5+20M9jQRAHyu1z+QxVRc/m DugAoek7BCSMkhGkwjIHCyPMtfiWYMzY9vjPXWrXasxvxii1a31uHtD2jc4S6lxTQRxh 7S5w== 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=HQnzlDikKOsDxf1h8spRLU9TXxPUqNDKctkg19RVkFM=; b=G7atEmWp+zbJeBUuFUi6mJFjJA9wLrFI37NlAo2GWMlI0tBliCugDJQVGcft/VO47w M9C14jwvvBEbZ3rGf4I+FWieN4rtcSPdgr71mPifZsPT/IuAF5IU9AA12wxyoDjKBPmf JZASTmyHo/Lm6m29wW6OkoTgd5czL4eOGbhkYfeRHgLALZw8IUU7IkLdOOLznHHnMPPR piVLDJ+MYKpyFaEXhk8/u3qF9xASxJ/t2eXVdwJ4e/2IPHBzgeNwWstS4zRIxx+49Vhu RMsjSPN6qkbguzLhiyaGK37wd2uhtpY0tHF71kb2gLtXRT5dJ9ZIFJ1C3tQft8ywICjX eclw== X-Gm-Message-State: AOAM5319St6Ul/EC5QpAp7164O4aDmpkr8s1SSk71Le7Cc+9moNdnbLP tOIBqqllSknb4z5Zxf0y24fsLQ== X-Google-Smtp-Source: ABdhPJzvZBtXMozuWBMlu0OwrFMFcyKndb2ocY+uEuiBi9hX0XjdbynP491SC406Vp3nqjZ1Z10hKg== X-Received: by 2002:a65:6745:0:b0:3db:2558:c458 with SMTP id c5-20020a656745000000b003db2558c458mr5166424pgu.211.1652328729922; Wed, 11 May 2022 21:12:09 -0700 (PDT) Received: from FVFYT0MHHV2J.bytedance.net ([139.177.225.234]) by smtp.gmail.com with ESMTPSA id q13-20020a170902edcd00b0015e8d4eb2dcsm2695161plk.294.2022.05.11.21.12.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 May 2022 21:12:09 -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 v11 0/4] add hugetlb_optimize_vmemmap sysctl Date: Thu, 12 May 2022 12:11:38 +0800 Message-Id: <20220512041142.39501-1-songmuchun@bytedance.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) MIME-Version: 1.0 Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=StMBboIs; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf23.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.210.180 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 4731D1400A4 X-Rspam-User: X-Stat-Signature: ur3x4yc8hcmpwjjbhwohb1ixkm1a6ib6 X-HE-Tag: 1652328717-897335 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: 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. v11: - Collect Reviewed-by from Mike. - Remove hugetlb_optimize_vmemmap_enabled() check from flush_free_hpage_work(). 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_vmemmap.c | 105 ++++++++++++++++++++---- mm/memory_hotplug.c | 27 ++++-- 5 files changed, 162 insertions(+), 24 deletions(-)