From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Look like all pieces are in place, we can map file-backed huge-pages
now.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/huge_mm.h | 4 +++-
mm/memory.c | 5 ++++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index f4d6626..903f097 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -78,7 +78,9 @@ extern bool is_vma_temporary_stack(struct vm_area_struct *vma);
(1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \
((__vma)->vm_flags & VM_HUGEPAGE))) && \
!((__vma)->vm_flags & VM_NOHUGEPAGE) && \
- !is_vma_temporary_stack(__vma))
+ !is_vma_temporary_stack(__vma) && \
+ (!(__vma)->vm_ops || \
+ mapping_can_have_hugepages((__vma)->vm_file->f_mapping)))
#define transparent_hugepage_defrag(__vma) \
((transparent_hugepage_flags & \
(1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \
diff --git a/mm/memory.c b/mm/memory.c
index ebff552..7fe9752 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3939,10 +3939,13 @@ retry:
if (!pmd)
return VM_FAULT_OOM;
if (pmd_none(*pmd) && transparent_hugepage_enabled(vma)) {
- int ret = 0;
+ int ret;
if (!vma->vm_ops)
ret = do_huge_pmd_anonymous_page(mm, vma, address,
pmd, flags);
+ else
+ ret = do_huge_linear_fault(mm, vma, address,
+ pmd, flags);
if ((ret & VM_FAULT_FALLBACK) == 0)
return ret;
} else {
--
1.7.10.4
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