memcg: add mm_vmscan_memcg_isolate tracepoint

Memcg also need to trace page isolation information as global reclaim.
This patch does it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 21 insertions, 0 deletions

diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index d9656444a7ca..370aa5a87322 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -231,6 +231,21 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
 
 );
 
+DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
+
+        TP_PROTO(int order,
+                unsigned long nr_requested,
+                unsigned long nr_scanned,
+                unsigned long nr_taken,
+                unsigned long nr_lumpy_taken,
+                unsigned long nr_lumpy_dirty,
+                unsigned long nr_lumpy_failed,
+                int isolate_mode),
+
+        TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+
+);
+
 TRACE_EVENT(mm_vmscan_writepage,
 
         TP_PROTO(struct page *page,
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index de54ea0094a1..0576e9e64586 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -51,6 +51,8 @@
 
 #include <asm/uaccess.h>
 
+#include <trace/events/vmscan.h>
+
 struct cgroup_subsys mem_cgroup_subsys __read_mostly;
 #define MEM_CGROUP_RECLAIM_RETRIES      5
 struct mem_cgroup *root_mem_cgroup __read_mostly;
@@ -1007,6 +1009,10 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
         }
 
         *scanned = scan;
+
+        trace_mm_vmscan_memcg_isolate(0, nr_to_scan, scan, nr_taken,
+                                      0, 0, 0, mode);
+
         return nr_taken;
 }