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[PATCH v2 0/9] HugeTLB migration support for PPC64

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  [PATCH v2 0/9] HugeTLB migration support for PPC64 "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> - 2017-05-16 11:30 +0200
    [PATCH v2 9/9] powerpc/hugetlb: Enable hugetlb migration for ppc64 "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> - 2017-05-16 11:30 +0200
    [PATCH v2 3/9] mm/hugetlb: export hugetlb_entry_migration helper "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> - 2017-05-16 11:30 +0200

#1642350 — [PATCH v2 0/9] HugeTLB migration support for PPC64

HugeTLB migration support for PPC64

Changes from V1:
* Added Reviewed-by:
* Drop follow_huge_addr from powerpc

Aneesh Kumar K.V (8):
  mm/hugetlb/migration: Use set_huge_pte_at instead of set_pte_at
  mm/follow_page_mask: Split follow_page_mask to smaller functions.
  mm/hugetlb: export hugetlb_entry_migration helper
  mm/hugetlb: Move default definition of hugepd_t earlier in the header
  mm/follow_page_mask: Add support for hugepage directory entry
  powerpc/hugetlb: Add follow_huge_pd implementation for ppc64.
  powerpc/mm/hugetlb: Remove follow_huge_addr for powerpc
  powerpc/hugetlb: Enable hugetlb migration for ppc64

Anshuman Khandual (1):
  mm/follow_page_mask: Add support for hugetlb pgd entries.

 arch/powerpc/mm/hugetlbpage.c          |  81 ++++++--------
 arch/powerpc/platforms/Kconfig.cputype |   5 +
 include/linux/hugetlb.h                |  56 ++++++----
 mm/gup.c                               | 186 +++++++++++++++++++++++----------
 mm/hugetlb.c                           |  25 ++++-
 mm/migrate.c                           |  21 ++--
 6 files changed, 230 insertions(+), 144 deletions(-)

-- 
2.7.4

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#1642354 — [PATCH v2 9/9] powerpc/hugetlb: Enable hugetlb migration for ppc64

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/Kconfig.cputype | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 80175000042d..8acc4f27d101 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -351,6 +351,11 @@ config PPC_RADIX_MMU
 	  is only implemented by IBM Power9 CPUs, if you don't have one of them
 	  you can probably disable this.
 
+config ARCH_ENABLE_HUGEPAGE_MIGRATION
+	def_bool y
+	depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
+
+
 config PPC_MMU_NOHASH
 	def_bool y
 	depends on !PPC_STD_MMU
-- 
2.7.4

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#1642355 — [PATCH v2 3/9] mm/hugetlb: export hugetlb_entry_migration helper

We will be using this later from the ppc64 code. Change the return type to bool.

Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 include/linux/hugetlb.h | 1 +
 mm/hugetlb.c            | 8 ++++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index b857fc8cc2ec..fddf6cf403d5 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -126,6 +126,7 @@ int pud_huge(pud_t pud);
 unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
 		unsigned long address, unsigned long end, pgprot_t newprot);
 
+bool is_hugetlb_entry_migration(pte_t pte);
 #else /* !CONFIG_HUGETLB_PAGE */
 
 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ce090186b992..25e2ee888a90 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3182,17 +3182,17 @@ static void set_huge_ptep_writable(struct vm_area_struct *vma,
 		update_mmu_cache(vma, address, ptep);
 }
 
-static int is_hugetlb_entry_migration(pte_t pte)
+bool is_hugetlb_entry_migration(pte_t pte)
 {
 	swp_entry_t swp;
 
 	if (huge_pte_none(pte) || pte_present(pte))
-		return 0;
+		return false;
 	swp = pte_to_swp_entry(pte);
 	if (non_swap_entry(swp) && is_migration_entry(swp))
-		return 1;
+		return true;
 	else
-		return 0;
+		return false;
 }
 
 static int is_hugetlb_entry_hwpoisoned(pte_t pte)
-- 
2.7.4

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