mm, rmap: account shmem thp pages

Let's add ShmemHugePages and ShmemPmdMapped fields into meminfo and
smaps.  It indicates how many times we allocate and map shmem THP.

NR_ANON_TRANSPARENT_HUGEPAGES is renamed to NR_ANON_THPS.

Link: http://lkml.kernel.org/r/1466021202-61880-27-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/mm/vmstat.c b/mm/vmstat.c
index cff2f4ec9cce..7997f52935c9 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -733,6 +733,8 @@ const char * const vmstat_text[] = {
         "workingset_activate",
         "workingset_nodereclaim",
         "nr_anon_transparent_hugepages",
+        "nr_shmem_hugepages",
+        "nr_shmem_pmdmapped",
         "nr_free_cma",
 
         /* enum writeback_stat_item counters */