[RFC 8/9] powerpc/mm: Enable HugeTLB page migration

From	Anshuman Khandual <khandual@linux.vnet.ibm.com>
Newsgroups	linux.kernel
Subject	[RFC 8/9] powerpc/mm: Enable HugeTLB page migration
Date	2016-03-09 13:20 +0100
Message-ID	<raLfQ-7Ms-25@gated-at.bofh.it> (permalink)
References	<raLfP-7Ms-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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This change enables HugeTLB page migration for PPC64_BOOK3S systems
for HugeTLB pages implemented at the PMD level. It enables the kernel
configuration option ARCH_ENABLE_HUGEPAGE_MIGRATION which turns on
'hugepage_migration_supported' function which is checked for feature
presence during migration.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
 arch/powerpc/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c6920bb..cefc368 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -86,6 +86,10 @@ config GENERIC_HWEIGHT
 config ARCH_HAS_DMA_SET_COHERENT_MASK
         bool
 
+config ARCH_ENABLE_HUGEPAGE_MIGRATION
+	def_bool y
+	depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
+
 config PPC
 	bool
 	default y
-- 
2.1.0

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[RFC 8/9] powerpc/mm: Enable HugeTLB page migration Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2016-03-09 13:20 +0100

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