per-task-delay-accounting: update taskstats for memory reclaim delay

Add members for memory reclaim delay to taskstats, and accumulate them in
__delayacct_add_tsk() .

Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/taskstats.h b/include/linux/taskstats.h
index 5d69c0744fff..18269e956a71 100644
--- a/include/linux/taskstats.h
+++ b/include/linux/taskstats.h
@@ -31,7 +31,7 @@
  */
 
 
-#define TASKSTATS_VERSION       6
+#define TASKSTATS_VERSION       7
 #define TS_COMM_LEN             32      /* should be >= TASK_COMM_LEN
                                          * in linux/sched.h */
 
@@ -157,6 +157,10 @@ struct taskstats {
         __u64   ac_utimescaled;         /* utime scaled on frequency etc */
         __u64   ac_stimescaled;         /* stime scaled on frequency etc */
         __u64   cpu_scaled_run_real_total; /* scaled cpu_run_real_total */
+
+        /* Delay waiting for memory reclaim */
+        __u64   freepages_count;
+        __u64   freepages_delay_total;
 };