Index: linux-2.6.16-rc2/mm/hugetlb.c
===================================================================
--- linux-2.6.16-rc2.orig/mm/hugetlb.c	2006-02-02 22:03:08.000000000 -0800
+++ linux-2.6.16-rc2/mm/hugetlb.c	2006-02-03 15:29:58.000000000 -0800
@@ -44,11 +44,14 @@ static struct page *dequeue_huge_page(st
 {
 	int nid = numa_node_id();
 	struct page *page = NULL;
-	struct zonelist *zonelist = huge_zonelist(vma, address);
+	struct zonelist *zonelist;
 	struct zone **z;
 
+	printk("dequeue_huge_page: vma=%p address=%lx\n", vma, address);
+	zonelist = huge_zonelist(vma, address);
 	for (z = zonelist->zones; *z; z++) {
 		nid = (*z)->zone_pgdat->node_id;
+		printk("node=%d z=%p\n", nid, *z);
 		if (cpuset_zone_allowed(*z, GFP_HIGHUSER) &&
 		    !list_empty(&hugepage_freelists[nid]))
 			break;
@@ -61,6 +64,7 @@ static struct page *dequeue_huge_page(st
 		free_huge_pages--;
 		free_huge_pages_node[nid]--;
 	}
+	printk("dequeue_huge_page returns %p\n",page);
 	return page;
 }
 
@@ -97,10 +101,12 @@ struct page *alloc_huge_page(struct vm_a
 	struct page *page;
 	int i;
 
+	printk(KERN_ERR "alloc_huge_page: vma=%p addr=%lx\n", vma, addr);
 	spin_lock(&hugetlb_lock);
 	page = dequeue_huge_page(vma, addr);
 	if (!page) {
 		spin_unlock(&hugetlb_lock);
+		printk(KERN_ERR "dequeue page failed\n");
 		return NULL;
 	}
 	spin_unlock(&hugetlb_lock);
@@ -108,6 +114,7 @@ struct page *alloc_huge_page(struct vm_a
 	page[1].mapping = (void *)free_huge_page;
 	for (i = 0; i < (HPAGE_SIZE/PAGE_SIZE); ++i)
 		clear_highpage(&page[i]);
+	printk(KERN_ERR "alloc_huge_page returns %p\n",page);
 	return page;
 }
 
@@ -428,6 +435,9 @@ int hugetlb_no_page(struct mm_struct *mm
 	struct address_space *mapping;
 	pte_t new_pte;
 
+	printk(KERN_ERR "hugetlb_no_page: mm=%p vma=%p address=%lx ptep=%p write=%d\n",
+		mm, vma, address, ptep, write_access);
+
 	mapping = vma->vm_file->f_mapping;
 	idx = ((address - vma->vm_start) >> HPAGE_SHIFT)
 		+ (vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT));
@@ -443,6 +453,7 @@ retry:
 			goto out;
 		page = alloc_huge_page(vma, address);
 		if (!page) {
+			printk(KERN_ERR "alloc_huge_page failed\n");
 			hugetlb_put_quota(mapping);
 			goto out;
 		}
@@ -484,6 +495,7 @@ retry:
 	spin_unlock(&mm->page_table_lock);
 	unlock_page(page);
 out:
+	printk(KERN_ERR "hugetlb_do_no_page returns %d\n", ret);
 	return ret;
 
 backout: