X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2Fhugetlb.c;h=db861d8b6c2824f460cc177f0d4008fd8850cc3e;hb=65f7651788e18fadb2fbb7276af935d7871e1803;hp=7224a4f071067c3d60a017d949daa2e97f0e8a5d;hpb=02d5bccf8ea3f9b8de21bfe19db77fbc50d92e04;p=linux-2.6-omap-h63xx.git

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 7224a4f0710..db861d8b6c2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -418,9 +418,14 @@ static struct page *alloc_huge_page_private(struct vm_area_struct *vma,
 	if (free_huge_pages > resv_huge_pages)
 		page = dequeue_huge_page(vma, addr);
 	spin_unlock(&hugetlb_lock);
-	if (!page)
+	if (!page) {
 		page = alloc_buddy_huge_page(vma, addr);
-	return page ? page : ERR_PTR(-VM_FAULT_OOM);
+		if (!page) {
+			hugetlb_put_quota(vma->vm_file->f_mapping, 1);
+			return ERR_PTR(-VM_FAULT_OOM);
+		}
+	}
+	return page;
 }
 
 static struct page *alloc_huge_page(struct vm_area_struct *vma,
@@ -694,6 +699,11 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
 		dst_pte = huge_pte_alloc(dst, addr);
 		if (!dst_pte)
 			goto nomem;
+
+		/* If the pagetables are shared don't copy or take references */
+		if (dst_pte == src_pte)
+			continue;
+
 		spin_lock(&dst->page_table_lock);
 		spin_lock(&src->page_table_lock);
 		if (!pte_none(*src_pte)) {
@@ -1206,8 +1216,10 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to)
 	if (hugetlb_get_quota(inode->i_mapping, chg))
 		return -ENOSPC;
 	ret = hugetlb_acct_memory(chg);
-	if (ret < 0)
+	if (ret < 0) {
+		hugetlb_put_quota(inode->i_mapping, chg);
 		return ret;
+	}
 	region_add(&inode->i_mapping->private_list, from, to);
 	return 0;
 }