[PATCH] sched: reduce debug code

move the rest of the debugging/instrumentation code to under
CONFIG_SCHEDSTATS too. This reduces code size and speeds code up:

    text    data     bss     dec     hex filename
   33044    4122      28   37194    914a sched.o.before
   32708    4122      28   36858    8ffa sched.o.after

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

1 files changed, 16 insertions, 6 deletions

diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 0eca442b7792..1c61e5315ad2 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -44,11 +44,16 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p, u64 now)
                 (long long)p->se.wait_runtime,
                 (long long)(p->nvcsw + p->nivcsw),
                 p->prio,
+#ifdef CONFIG_SCHEDSTATS
                 (long long)p->se.sum_exec_runtime,
                 (long long)p->se.sum_wait_runtime,
                 (long long)p->se.sum_sleep_runtime,
                 (long long)p->se.wait_runtime_overruns,
-                (long long)p->se.wait_runtime_underruns);
+                (long long)p->se.wait_runtime_underruns
+#else
+                0LL, 0LL, 0LL, 0LL, 0LL
+#endif
+        );
 }
 
 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu, u64 now)
@@ -171,7 +176,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
         u64 now = ktime_to_ns(ktime_get());
         int cpu;
 
-        SEQ_printf(m, "Sched Debug Version: v0.05, %s %.*s\n",
+        SEQ_printf(m, "Sched Debug Version: v0.05-v20, %s %.*s\n",
                 init_utsname()->release,
                 (int)strcspn(init_utsname()->version, " "),
                 init_utsname()->version);
@@ -235,21 +240,24 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
 #define P(F) \
         SEQ_printf(m, "%-25s:%20Ld\n", #F, (long long)p->F)
 
-        P(se.wait_start);
+        P(se.wait_runtime);
         P(se.wait_start_fair);
         P(se.exec_start);
-        P(se.sleep_start);
         P(se.sleep_start_fair);
+        P(se.sum_exec_runtime);
+
+#ifdef CONFIG_SCHEDSTATS
+        P(se.wait_start);
+        P(se.sleep_start);
         P(se.block_start);
         P(se.sleep_max);
         P(se.block_max);
         P(se.exec_max);
         P(se.wait_max);
-        P(se.wait_runtime);
         P(se.wait_runtime_overruns);
         P(se.wait_runtime_underruns);
         P(se.sum_wait_runtime);
-        P(se.sum_exec_runtime);
+#endif
         SEQ_printf(m, "%-25s:%20Ld\n",
                    "nr_switches", (long long)(p->nvcsw + p->nivcsw));
         P(se.load.weight);
@@ -269,7 +277,9 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
 
 void proc_sched_set_task(struct task_struct *p)
 {
+#ifdef CONFIG_SCHEDSTATS
         p->se.sleep_max = p->se.block_max = p->se.exec_max = p->se.wait_max = 0;
         p->se.wait_runtime_overruns = p->se.wait_runtime_underruns = 0;
+#endif
         p->se.sum_exec_runtime = 0;
 }