[PATCH] sched: reduce task_struct size

more task_struct size reduction, by moving the debugging/instrumentation
fields to under CONFIG_SCHEDSTATS:

 (i386, nodebug):

                          size
                          ----
     pre-CFS              1328
         CFS              1472
         CFS+patch        1376

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 8 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c9e0c2a6a950..17249fae5014 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -904,23 +904,28 @@ struct sched_entity {
         struct rb_node          run_node;
         unsigned int            on_rq;
 
+        u64                     exec_start;
+        u64                     sum_exec_runtime;
         u64                     wait_start_fair;
+        u64                     sleep_start_fair;
+
+#ifdef CONFIG_SCHEDSTATS
         u64                     wait_start;
-        u64                     exec_start;
+        u64                     wait_max;
+        s64                     sum_wait_runtime;
+
         u64                     sleep_start;
-        u64                     sleep_start_fair;
-        u64                     block_start;
         u64                     sleep_max;
+        s64                     sum_sleep_runtime;
+
+        u64                     block_start;
         u64                     block_max;
         u64                     exec_max;
-        u64                     wait_max;
-        u64                     last_ran;
 
-        u64                     sum_exec_runtime;
-        s64                     sum_wait_runtime;
-        s64                     sum_sleep_runtime;
         unsigned long           wait_runtime_overruns;
         unsigned long           wait_runtime_underruns;
+#endif
+
 #ifdef CONFIG_FAIR_GROUP_SCHED
         struct sched_entity     *parent;
         /* rq on which this entity is (to be) queued: */