Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

1 files changed, 14 insertions, 3 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 74c1b6b0b37b..51c9e2c01640 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -401,12 +401,20 @@ static void return_unused_surplus_pages(unsigned long unused_resv_pages)
 	struct page *page;
 	unsigned long nr_pages;
 
+	/*
+	 * We want to release as many surplus pages as possible, spread
+	 * evenly across all nodes. Iterate across all nodes until we
+	 * can no longer free unreserved surplus pages. This occurs when
+	 * the nodes with surplus pages have no free pages.
+	 */
+	unsigned long remaining_iterations = num_online_nodes();
+
 	/* Uncommit the reservation */
 	resv_huge_pages -= unused_resv_pages;
 
 	nr_pages = min(unused_resv_pages, surplus_huge_pages);
 
-	while (nr_pages) {
+	while (remaining_iterations-- && nr_pages) {
 		nid = next_node(nid, node_online_map);
 		if (nid == MAX_NUMNODES)
 			nid = first_node(node_online_map);
@@ -424,6 +432,7 @@ static void return_unused_surplus_pages(unsigned long unused_resv_pages)
 			surplus_huge_pages--;
 			surplus_huge_pages_node[nid]--;
 			nr_pages--;
+			remaining_iterations = num_online_nodes();
 		}
 	}
 }
@@ -671,9 +680,11 @@ int hugetlb_report_node_meminfo(int nid, char *buf)
 {
 	return sprintf(buf,
 		"Node %d HugePages_Total: %5u\n"
-		"Node %d HugePages_Free:  %5u\n",
+		"Node %d HugePages_Free:  %5u\n"
+		"Node %d HugePages_Surp:  %5u\n",
 		nid, nr_huge_pages_node[nid],
-		nid, free_huge_pages_node[nid]);
+		nid, free_huge_pages_node[nid],
+		nid, surplus_huge_pages_node[nid]);
 }
 
 /* Return the number pages of memory we physically have, in PAGE_SIZE units. */