hugetlb: indicate surplus huge page counts in per-node meminfo

Currently we show the surplus hugetlb pool state in /proc/meminfo, but
not in the per-node meminfo files, even though we track the information
on a per-node basis. Printing it there can help track down dynamic pool
bugs including the one in the follow-on patch.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 74c1b6b0b37b..40d841cb5126 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -671,9 +671,11 @@ 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. */