linux-kernel - [PATCH 01/10] thp: vma_adjust_trans_huge(): adjust file-backed VMA too

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Date:	Fri, 10 Jul 2015 16:29:16 -0400
From:	Matthew Wilcox <matthew.r.wilcox@...el.com>
To:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	willy@...ux.intel.com
Subject: [PATCH 01/10] thp: vma_adjust_trans_huge(): adjust file-backed VMA too

From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>

Since we're going to have huge pages in page cache, we need to call
adjust file-backed VMA, which potentially can contain huge pages.

For now we call it for all VMAs.

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@...ux.intel.com>
Acked-by: Hillf Danton <dhillf@...il.com>
---
 include/linux/huge_mm.h | 11 +----------
 mm/huge_memory.c        |  2 +-
 2 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index f10b20f..1c53c7d 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -122,7 +122,7 @@ extern void split_huge_page_pmd_mm(struct mm_struct *mm, unsigned long address,
 #endif
 extern int hugepage_madvise(struct vm_area_struct *vma,
 			    unsigned long *vm_flags, int advice);
-extern void __vma_adjust_trans_huge(struct vm_area_struct *vma,
+extern void vma_adjust_trans_huge(struct vm_area_struct *vma,
 				    unsigned long start,
 				    unsigned long end,
 				    long adjust_next);
@@ -138,15 +138,6 @@ static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
 	else
 		return 0;
 }
-static inline void vma_adjust_trans_huge(struct vm_area_struct *vma,
-					 unsigned long start,
-					 unsigned long end,
-					 long adjust_next)
-{
-	if (!vma->anon_vma || vma->vm_ops)
-		return;
-	__vma_adjust_trans_huge(vma, start, end, adjust_next);
-}
 static inline int hpage_nr_pages(struct page *page)
 {
 	if (unlikely(PageTransHuge(page)))
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c107094..911071b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2967,7 +2967,7 @@ static void split_huge_page_address(struct mm_struct *mm,
 	split_huge_page_pmd_mm(mm, address, pmd);
 }
 
-void __vma_adjust_trans_huge(struct vm_area_struct *vma,
+void vma_adjust_trans_huge(struct vm_area_struct *vma,
 			     unsigned long start,
 			     unsigned long end,
 			     long adjust_next)
-- 
2.1.4

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