sched: remove unused fields from struct rq

Impact: cleanup, new schedstat ABI

Since they are used on in statistics and are always set to zero, the
following fields from struct rq have been removed: yld_exp_empty,
yld_act_empty and yld_both_empty.

Both Sched Debug and SCHEDSTAT_VERSION versions has also been
incremented since ABIs have been changed.

The schedtop tool has been updated to properly handle new version of
schedstat:

   http://rt.wiki.kernel.org/index.php/Schedtop_utility

Signed-off-by: Luis Henriques <henrix@sapo.pt>
Acked-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20090324221002.GA10061@hades.domain.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index d2dfe4c..7b389c7 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -638,9 +638,6 @@ struct rq {
        /* could above be rq->cfs_rq.exec_clock + rq->rt_rq.rt_runtime ? */
 
        /* sys_sched_yield() stats */
-       unsigned int yld_exp_empty;
-       unsigned int yld_act_empty;
-       unsigned int yld_both_empty;
        unsigned int yld_count;
 
        /* schedule() stats */

diff --cc kernel/sched_debug.c
Simple merge

diff --cc kernel/sched_stats.h
Simple merge