From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f199.google.com (mail-qk0-f199.google.com [209.85.220.199]) by kanga.kvack.org (Postfix) with ESMTP id E920E6B02A4 for ; Mon, 26 Sep 2016 11:24:06 -0400 (EDT) Received: by mail-qk0-f199.google.com with SMTP id n185so193137049qke.2 for ; Mon, 26 Sep 2016 08:24:06 -0700 (PDT) Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com. [66.111.4.26]) by mx.google.com with ESMTPS id q54si14804583qte.113.2016.09.26.08.24.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 26 Sep 2016 08:24:06 -0700 (PDT) From: zi.yan@sent.com Subject: [PATCH v1 02/12] mm: thp: introduce CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION Date: Mon, 26 Sep 2016 11:22:24 -0400 Message-Id: <20160926152234.14809-3-zi.yan@sent.com> In-Reply-To: <20160926152234.14809-1-zi.yan@sent.com> References: <20160926152234.14809-1-zi.yan@sent.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: benh@kernel.crashing.org, mgorman@techsingularity.net, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, dave.hansen@linux.intel.com, n-horiguchi@ah.jp.nec.com From: Naoya Horiguchi Introduces CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION to limit thp migration functionality to x86_64, which should be safer at the first step. Signed-off-by: Naoya Horiguchi --- arch/x86/Kconfig | 4 ++++ include/linux/huge_mm.h | 10 ++++++++++ mm/Kconfig | 3 +++ 3 files changed, 17 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2a1f0ce..ad99c05 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2234,6 +2234,10 @@ config ARCH_ENABLE_HUGEPAGE_MIGRATION def_bool y depends on X86_64 && HUGETLB_PAGE && MIGRATION +config ARCH_ENABLE_THP_MIGRATION + def_bool y + depends on X86_64 && TRANSPARENT_HUGEPAGE && MIGRATION + menu "Power management and ACPI options" config ARCH_HIBERNATION_HEADER diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 6f14de4..4ae156e 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -157,6 +157,11 @@ void put_huge_zero_page(void); #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) +static inline bool thp_migration_supported(void) +{ + return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION); +} + #else /* CONFIG_TRANSPARENT_HUGEPAGE */ #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) @@ -223,6 +228,11 @@ static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, { return NULL; } + +static inline bool thp_migration_supported(void) +{ + return false; +} #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif /* _LINUX_HUGE_MM_H */ diff --git a/mm/Kconfig b/mm/Kconfig index be0ee11..1965310 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -289,6 +289,9 @@ config MIGRATION config ARCH_ENABLE_HUGEPAGE_MIGRATION bool +config ARCH_ENABLE_THP_MIGRATION + bool + config PHYS_ADDR_T_64BIT def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT -- 2.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org