From patchwork Thu Feb 4 07:01:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12066417 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 92CECC433DB for ; Thu, 4 Feb 2021 07:01:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1A49064D99 for ; Thu, 4 Feb 2021 07:01:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A49064D99 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 97A206B006E; Thu, 4 Feb 2021 02:01:18 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 94FDB6B0070; Thu, 4 Feb 2021 02:01:18 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 817436B0071; Thu, 4 Feb 2021 02:01:18 -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 6D3296B006E for ; Thu, 4 Feb 2021 02:01:18 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 402E93634 for ; Thu, 4 Feb 2021 07:01:18 +0000 (UTC) X-FDA: 77779689036.18.gun42_2611bb5275da Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin18.hostedemail.com (Postfix) with ESMTP id 26A32100ED0D0 for ; Thu, 4 Feb 2021 07:01:18 +0000 (UTC) X-HE-Tag: gun42_2611bb5275da X-Filterd-Recvd-Size: 2558 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf26.hostedemail.com (Postfix) with ESMTP for ; Thu, 4 Feb 2021 07:01:17 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3EA5D1396; Wed, 3 Feb 2021 23:01:16 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.94.58]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 983C73F694; Wed, 3 Feb 2021 23:01:12 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, akpm@linux-foundation.org Cc: Anshuman Khandual , Will Deacon , Robin Murphy , Marek Szyprowski , Christoph Hellwig , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [RFC 2/3] arm64/hugetlb: Enable HUGETLB_PAGE_SIZE_VARIABLE Date: Thu, 4 Feb 2021 12:31:23 +0530 Message-Id: <1612422084-30429-3-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1612422084-30429-1-git-send-email-anshuman.khandual@arm.com> References: <1612422084-30429-1-git-send-email-anshuman.khandual@arm.com> 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: MAX_ORDER which invariably depends on FORCE_MAX_ZONEORDER can be a variable for a given page size, depending on whether TRANSPARENT_HUGEPAGE is enabled or not. In certain page size and THP combinations HUGETLB_PAGE_ORDER can be greater than MAX_ORDER, making it unusable as pageblock_order. This enables HUGETLB_PAGE_SIZE_VARIABLE making pageblock_order a variable rather than the compile time constant HUGETLB_PAGE_ORDER which could break MAX_ORDER rule for certain configurations. Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/arm64/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 175914f2f340..c4acf8230f20 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1918,6 +1918,10 @@ config ARCH_ENABLE_THP_MIGRATION def_bool y depends on TRANSPARENT_HUGEPAGE +config HUGETLB_PAGE_SIZE_VARIABLE + def_bool y + depends on HUGETLB_PAGE + menu "Power management options" source "kernel/power/Kconfig"