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Subject[PATCH 2/7] copy_vma for hugetlbfs
Date

Signed-off-by: Adam Litke <agl@us.ibm.com>
---
fs/hugetlbfs/inode.c | 6 ++++++
mm/memory.c | 4 ++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 8c718a3..2452dde 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -36,6 +36,7 @@
static const struct super_operations hugetlbfs_ops;
static const struct address_space_operations hugetlbfs_aops;
const struct file_operations hugetlbfs_file_operations;
+static const struct pagetable_operations_struct hugetlbfs_pagetable_ops;
static const struct inode_operations hugetlbfs_dir_inode_operations;
static const struct inode_operations hugetlbfs_inode_operations;

@@ -70,6 +71,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
*/
vma->vm_flags |= VM_HUGETLB | VM_RESERVED;
vma->vm_ops = &hugetlb_vm_ops;
+ vma->pagetable_ops = &hugetlbfs_pagetable_ops;

vma_len = (loff_t)(vma->vm_end - vma->vm_start);

@@ -563,6 +565,10 @@ const struct file_operations hugetlbfs_file_operations = {
.get_unmapped_area = hugetlb_get_unmapped_area,
};

+static const struct pagetable_operations_struct hugetlbfs_pagetable_ops = {
+ .copy_vma = copy_hugetlb_page_range,
+};
+
static const struct inode_operations hugetlbfs_dir_inode_operations = {
.create = hugetlbfs_create,
.lookup = simple_lookup,
diff --git a/mm/memory.c b/mm/memory.c
index e7066e7..69bb0b3 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -602,8 +602,8 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
return 0;
}

- if (is_vm_hugetlb_page(vma))
- return copy_hugetlb_page_range(dst_mm, src_mm, vma);
+ if (has_pt_op(vma, copy_vma))
+ return pt_op(vma, copy_vma)(dst_mm, src_mm, vma);

dst_pgd = pgd_offset(dst_mm, addr);
src_pgd = pgd_offset(src_mm, addr);
-
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