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From: Zi Yan <zi.yan@sent.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Cc: kirill.shutemov@linux.intel.com, minchan@kernel.org,
	vbabka@suse.cz, mgorman@techsingularity.net, mhocko@kernel.org,
	khandual@linux.vnet.ibm.com, zi.yan@cs.rutgers.edu,
	dnellans@nvidia.com, dave.hansen@intel.com,
	n-horiguchi@ah.jp.nec.com
Subject: [PATCH v9 04/10] mm: thp: introduce CONFIG_ARCH_ENABLE_THP_MIGRATION
Date: Mon, 17 Jul 2017 15:39:49 -0400	[thread overview]
Message-ID: <20170717193955.20207-5-zi.yan@sent.com> (raw)
In-Reply-To: <20170717193955.20207-1-zi.yan@sent.com>

From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

Introduces CONFIG_ARCH_ENABLE_THP_MIGRATION to limit thp migration
functionality to x86_64, which should be safer at the first step.

ChangeLog v1 -> v2:
- fixed config name in subject and patch description

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
 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 6b8d49ec54be..0bc7a1b84fdc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2285,6 +2285,10 @@ 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
+
 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 ee696347f928..d8f35a0865dc 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -233,6 +233,11 @@ void mm_put_huge_zero_page(struct mm_struct *mm);
 
 #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; })
@@ -336,6 +341,11 @@ static inline struct page *follow_devmap_pud(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 e1e1f65e5b91..fd79351c5b44 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -262,6 +262,9 @@ 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
 
-- 
2.11.0

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  parent reply	other threads:[~2017-07-17 19:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-17 19:39 [PATCH v9 00/10] mm: page migration enhancement for thp Zi Yan
2017-07-17 19:39 ` [PATCH v9 01/10] mm: mempolicy: add queue_pages_required() Zi Yan
2017-07-17 19:39 ` [PATCH v9 02/10] mm: x86: move _PAGE_SWP_SOFT_DIRTY from bit 7 to bit 1 Zi Yan
2017-07-17 19:39 ` [PATCH v9 03/10] mm: thp: introduce separate TTU flag for thp freezing Zi Yan
2017-07-17 19:39 ` Zi Yan [this message]
2017-07-17 19:39 ` [PATCH v9 05/10] mm: thp: enable thp migration in generic path Zi Yan
2017-07-19  8:04   ` kbuild test robot
2017-07-19 18:39     ` Zi Yan
2017-07-19 20:59       ` Andrew Morton
2017-07-20  2:54         ` Zi Yan
2017-07-17 19:39 ` [PATCH v9 06/10] mm: thp: check pmd migration entry in common path Zi Yan
2017-07-19  8:02   ` Michal Hocko
2017-07-19 15:01     ` Zi Yan
2017-07-17 19:39 ` [PATCH v9 07/10] mm: soft-dirty: keep soft-dirty bits over thp migration Zi Yan
2017-07-17 19:39 ` [PATCH v9 08/10] mm: mempolicy: mbind and migrate_pages support " Zi Yan
2017-07-17 19:39 ` [PATCH v9 09/10] mm: migrate: move_pages() supports " Zi Yan
2017-07-17 19:39 ` [PATCH v9 10/10] mm: memory_hotplug: memory hotremove " Zi Yan

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