[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>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c9e0c2a6a9507b4287c07dd198261ee9f20f8b0d..17249fae501450ab42843ac2c53ffd2b536b064c 100644 (file)
--- 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: */