From patchwork Fri Oct 12 03:59:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 10637833 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8875013AD for ; Fri, 12 Oct 2018 04:03:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 70D912B9DE for ; Fri, 12 Oct 2018 04:03:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 60CBE2BE50; Fri, 12 Oct 2018 04:03:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D1B692B9DE for ; Fri, 12 Oct 2018 04:03:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=1HeJ/zslKzc8KP7mYr10+xfoC9/WV3ktHKHI807bE+g=; b=MdRXsyb9N5mzpCoX3VrkC43U4f /vBIkrH9FtfBdE+4L42uMvaIjZcDvIMs4xP5s2IiT0P+CpYP06KEToljOPWelHtz0a1sqllvu3A3s P+GFPvnUKHqFRPOceFVjwSnkuJM3Pw6ZLVOtT7XJ5fPVsjpu8u81+8s5gzAeBd0nnNok15RGyeNcs /VBgelagjUQysZbqk1Wrm9lcZamiTrKMkRsc1HWCxmHi4N84sufl/tplptcMfAnODjyasZsPxtmdX Fc2/OZkGH7AIFMVvHE9P5aF4CZ9NXXbMM5Of5NN11Mcm1rLaNnZGASrwffmypg7NdRAvnAXoQClPb 4u9vbUhQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gAog0-0008VE-20; Fri, 12 Oct 2018 04:03:48 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gAodA-00077s-J3 for linux-arm-kernel@lists.infradead.org; Fri, 12 Oct 2018 04:01:15 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9D3FFEBD; Thu, 11 Oct 2018 21:00:46 -0700 (PDT) Received: from p8cg001049571a15.blr.arm.com (p8cg001049571a15.blr.arm.com [10.162.0.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id DDA863F5B7; Thu, 11 Oct 2018 21:00:42 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 5/5] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages Date: Fri, 12 Oct 2018 09:29:59 +0530 Message-Id: <1539316799-6064-6-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1539316799-6064-1-git-send-email-anshuman.khandual@arm.com> References: <1539316799-6064-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181011_210052_672012_C4F2C5A5 X-CRM114-Status: GOOD ( 11.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: steve.capper@arm.com, catalin.marinas@arm.com, punit.agrawal@arm.com, will.deacon@arm.com, Steven.Price@arm.com, akpm@linux-foundation.org, mhocko@kernel.org, n-horiguchi@ah.jp.nec.com, suzuki.poulose@arm.com, mike.kravetz@oracle.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Let arm64 subscribe to the previously added framework in which architecture can inform whether a given huge page size is supported for migration. This just overrides the default function arch_hugetlb_migration_supported() and enables migration for all possible HugeTLB page sizes on arm64. With this, HugeTLB migration support on arm64 now covers all possible HugeTLB options. CONT PTE PMD CONT PMD PUD -------- --- -------- --- 4K: 64K 2M 32M 1G 16K: 2M 32M 1G 64K: 2M 512M 16G Signed-off-by: Anshuman Khandual --- arch/arm64/include/asm/hugetlb.h | 5 +++++ arch/arm64/mm/hugetlbpage.c | 20 ++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h index e73f685..656f70e 100644 --- a/arch/arm64/include/asm/hugetlb.h +++ b/arch/arm64/include/asm/hugetlb.h @@ -20,6 +20,11 @@ #include +#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION +#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported +extern bool arch_hugetlb_migration_supported(struct hstate *h); +#endif + static inline pte_t huge_ptep_get(pte_t *ptep) { return READ_ONCE(*ptep); diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 4eafd9f..28f4795 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -27,6 +27,26 @@ #include #include +#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION +bool arch_hugetlb_migration_supported(struct hstate *h) +{ + size_t pagesize = huge_page_size(h); + + switch (pagesize) { +#ifdef CONFIG_ARM64_4K_PAGES + case PUD_SIZE: +#endif + case PMD_SIZE: + case CONT_PMD_SIZE: + case CONT_PTE_SIZE: + return true; + } + pr_warn("%s: unrecognized huge page size 0x%lx\n", + __func__, pagesize); + return false; +} +#endif + int pmd_huge(pmd_t pmd) { return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);