thp: transparent hugepage sysfs meminfo

Add hugepage statistics to per-node sysfs meminfo

Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/base/node.c b/drivers/base/node.c
index ce012a9c6201..36b43052001d 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -117,12 +117,21 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
                        "Node %d WritebackTmp:   %8lu kB\n"
                        "Node %d Slab:           %8lu kB\n"
                        "Node %d SReclaimable:   %8lu kB\n"
-                       "Node %d SUnreclaim:     %8lu kB\n",
+                       "Node %d SUnreclaim:     %8lu kB\n"
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+                       "Node %d AnonHugePages:  %8lu kB\n"
+#endif
+                        ,
                        nid, K(node_page_state(nid, NR_FILE_DIRTY)),
                        nid, K(node_page_state(nid, NR_WRITEBACK)),
                        nid, K(node_page_state(nid, NR_FILE_PAGES)),
                        nid, K(node_page_state(nid, NR_FILE_MAPPED)),
-                       nid, K(node_page_state(nid, NR_ANON_PAGES)),
+                       nid, K(node_page_state(nid, NR_ANON_PAGES)
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+                        + node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
+                        HPAGE_PMD_NR
+#endif
+                       ),
                        nid, K(node_page_state(nid, NR_SHMEM)),
                        nid, node_page_state(nid, NR_KERNEL_STACK) *
                                 THREAD_SIZE / 1024,
@@ -133,7 +142,13 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
                        nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
                                 node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
                        nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
-                       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
+                       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+                        , nid,
+                        K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
+                        HPAGE_PMD_NR)
+#endif
+                       );
         n += hugetlb_report_node_meminfo(nid, buf + n);
         return n;
 }