From patchwork Thu Jul 1 01:47:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12353075 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 48D77C11F69 for ; Thu, 1 Jul 2021 01:47:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E91F161468 for ; Thu, 1 Jul 2021 01:47:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E91F161468 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6E1C48D01DB; Wed, 30 Jun 2021 21:47:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 690CF8D01D0; Wed, 30 Jun 2021 21:47:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 533F78D01DB; Wed, 30 Jun 2021 21:47:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0060.hostedemail.com [216.40.44.60]) by kanga.kvack.org (Postfix) with ESMTP id 27C3E8D01D0 for ; Wed, 30 Jun 2021 21:47:32 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id ED91625F5B for ; Thu, 1 Jul 2021 01:47:31 +0000 (UTC) X-FDA: 78312331902.11.2743471 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf08.hostedemail.com (Postfix) with ESMTP id 9D8FB30000A8 for ; Thu, 1 Jul 2021 01:47:31 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id E8F8E6120C; Thu, 1 Jul 2021 01:47:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1625104050; bh=4YLZtCkgZIalRP/2sK4O76TGFUPJqbCxP4AmDrqm3fc=; h=Date:From:To:Subject:In-Reply-To:From; b=FDMNpy81/Rs/BtfPIAW1oaBs5V3+MZg1r5EmspWBNlcgzEU9caRB2XBkg3MkzT+X2 JDMmHmP+OHIGwD5EnFzj2pN5brzKBo2Esv47P5MW0dwmAOxSIIDtOFgoBHgLtIy9W0 A4V8zDAIo+Ci/C+GhkW4VwEucs0SlNB3qyBN7xLU= Date: Wed, 30 Jun 2021 18:47:29 -0700 From: Andrew Morton To: akpm@linux-foundation.org, almasrymina@google.com, anshuman.khandual@arm.com, bodeddub@amazon.com, bp@alien8.de, bsingharora@gmail.com, chenhuang5@huawei.com, corbet@lwn.net, dave.hansen@linux.intel.com, david@redhat.com, duanxiongchun@bytedance.com, hpa@zytor.com, joao.m.martins@oracle.com, jroedel@suse.de, linmiaohe@huawei.com, linux-mm@kvack.org, luto@kernel.org, mhocko@suse.com, mike.kravetz@oracle.com, mingo@redhat.com, mm-commits@vger.kernel.org, naoya.horiguchi@nec.com, oneukum@suse.com, osalvador@suse.de, paulmck@kernel.org, pawan.kumar.gupta@linux.intel.com, peterz@infradead.org, rdunlap@infradead.org, rientjes@google.com, song.bao.hua@hisilicon.com, songmuchun@bytedance.com, tglx@linutronix.de, torvalds@linux-foundation.org, viro@zeniv.linux.org.uk, willy@infradead.org Subject: [patch 008/192] mm: memory_hotplug: disable memmap_on_memory when hugetlb_free_vmemmap enabled Message-ID: <20210701014729.o3VEGZzKA%akpm@linux-foundation.org> In-Reply-To: <20210630184624.9ca1937310b0dd5ce66b30e7@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9D8FB30000A8 X-Stat-Signature: itsmoij7fpf1b7koxj9trgmckkqw9urj Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=FDMNpy81; dmarc=none; spf=pass (imf08.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-HE-Tag: 1625104051-968308 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: From: Muchun Song Subject: mm: memory_hotplug: disable memmap_on_memory when hugetlb_free_vmemmap enabled The parameter of memory_hotplug.memmap_on_memory is not compatible with hugetlb_free_vmemmap. So disable it when hugetlb_free_vmemmap is enabled. [akpm@linux-foundation.org: remove unneeded include, per Oscar] Link: https://lkml.kernel.org/r/20210510030027.56044-9-songmuchun@bytedance.com Signed-off-by: Muchun Song Acked-by: Mike Kravetz Cc: Alexander Viro Cc: Andy Lutomirski Cc: Anshuman Khandual Cc: Balbir Singh Cc: Barry Song Cc: Bodeddula Balasubramaniam Cc: Borislav Petkov Cc: Chen Huang Cc: Dave Hansen Cc: David Hildenbrand Cc: David Rientjes Cc: HORIGUCHI NAOYA Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Joao Martins Cc: Joerg Roedel Cc: Jonathan Corbet Cc: Matthew Wilcox Cc: Miaohe Lin Cc: Michal Hocko Cc: Mina Almasry Cc: Oliver Neukum Cc: Oscar Salvador Cc: Paul E. McKenney Cc: Pawan Gupta Cc: Peter Zijlstra Cc: Randy Dunlap Cc: Thomas Gleixner Cc: Xiongchun Duan Signed-off-by: Andrew Morton --- Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++ mm/memory_hotplug.c | 1 + 2 files changed, 9 insertions(+) --- a/Documentation/admin-guide/kernel-parameters.txt~mm-memory_hotplug-disable-memmap_on_memory-when-hugetlb_free_vmemmap-enabled +++ a/Documentation/admin-guide/kernel-parameters.txt @@ -1584,6 +1584,10 @@ on: enable the feature off: disable the feature + This is not compatible with memory_hotplug.memmap_on_memory. + If both parameters are enabled, hugetlb_free_vmemmap takes + precedence over memory_hotplug.memmap_on_memory. + hung_task_panic= [KNL] Should the hung task detector generate panics. Format: 0 | 1 @@ -2850,6 +2854,10 @@ Note that even when enabled, there are a few cases where the feature is not effective. + This is not compatible with hugetlb_free_vmemmap. If + both parameters are enabled, hugetlb_free_vmemmap takes + precedence over memory_hotplug.memmap_on_memory. + memtest= [KNL,X86,ARM,PPC,RISCV] Enable memtest Format: default : 0 --- a/mm/memory_hotplug.c~mm-memory_hotplug-disable-memmap_on_memory-when-hugetlb_free_vmemmap-enabled +++ a/mm/memory_hotplug.c @@ -1056,6 +1056,7 @@ bool mhp_supports_memmap_on_memory(unsig * populate a single PMD. */ return memmap_on_memory && + !is_hugetlb_free_vmemmap_enabled() && IS_ENABLED(CONFIG_MHP_MEMMAP_ON_MEMORY) && size == memory_block_size_bytes() && IS_ALIGNED(vmemmap_size, PMD_SIZE) &&