| From | "Kirill A. Shutemov" <> | Subject | [PATCHv3, RFC 33/34] thp: call __vma_adjust_trans_huge() for file-backed VMA | Date | Fri, 5 Apr 2013 14:59:57 +0300 |
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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
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@linux.intel.com> --- 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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