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-rw-r--r--mm/hugetlb.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f43b3dc..3992bd5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -116,7 +116,9 @@ static void update_and_free_page(struct page *page)
static void free_huge_page(struct page *page)
{
int nid = page_to_nid(page);
+ struct address_space *mapping;
+ mapping = (struct address_space *) page_private(page);
BUG_ON(page_count(page));
INIT_LIST_HEAD(&page->lru);
@@ -129,6 +131,9 @@ static void free_huge_page(struct page *page)
enqueue_huge_page(page);
}
spin_unlock(&hugetlb_lock);
+ if (mapping)
+ hugetlb_put_quota(mapping);
+ set_page_private(page, 0);
}
/*
@@ -388,8 +393,10 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
page = alloc_huge_page_shared(vma, addr);
else
page = alloc_huge_page_private(vma, addr);
- if (page)
+ if (page) {
set_page_refcounted(page);
+ set_page_private(page, (unsigned long) vma->vm_file->f_mapping);
+ }
return page;
}
@@ -730,6 +737,8 @@ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma,
set_huge_ptep_writable(vma, address, ptep);
return 0;
}
+ if (hugetlb_get_quota(vma->vm_file->f_mapping))
+ return VM_FAULT_SIGBUS;
page_cache_get(old_page);
new_page = alloc_huge_page(vma, address);
@@ -796,7 +805,6 @@ retry:
err = add_to_page_cache(page, mapping, idx, GFP_KERNEL);
if (err) {
put_page(page);
- hugetlb_put_quota(mapping);
if (err == -EEXIST)
goto retry;
goto out;
@@ -830,7 +838,6 @@ out:
backout:
spin_unlock(&mm->page_table_lock);
- hugetlb_put_quota(mapping);
unlock_page(page);
put_page(page);
goto out;