From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Since we're going to have huge pages in page cache, we need to call
__vma_adjust_trans_huge() for file-backed VMA, which potentially can
contain huge pages.
For now we call it for all VMAs with vm_ops->huge_fault defined.
Probably later we will need to introduce a flag to indicate that the VMA
has huge pages.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/huge_mm.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index aa52c48..c6e3aef 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -161,9 +161,9 @@ static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
unsigned long end,
long adjust_next)
{
- if (!vma->anon_vma || vma->vm_ops)
- return;
- __vma_adjust_trans_huge(vma, start, end, adjust_next);
+ if ((vma->anon_vma && !vma->vm_ops) ||
+ (vma->vm_ops && vma->vm_ops->huge_fault))
+ __vma_adjust_trans_huge(vma, start, end, adjust_next);
}
static inline int hpage_nr_pages(struct page *page)
{
--
1.7.10.4
--
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