sched/debug: Add debugfs knob for "sched_debug"

I'm forever late for editing my kernel cmdline, add a runtime knob to
disable the "sched_debug" thing.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170907150614.142924283@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4a23bbc3111b..b19d06ea6e10 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -181,11 +181,16 @@ static const struct file_operations sched_feat_fops = {
         .release        = single_release,
 };
 
+__read_mostly bool sched_debug_enabled;
+
 static __init int sched_init_debug(void)
 {
         debugfs_create_file("sched_features", 0644, NULL, NULL,
                         &sched_feat_fops);
 
+        debugfs_create_bool("sched_debug", 0644, NULL,
+                        &sched_debug_enabled);
+
         return 0;
 }
 late_initcall(sched_init_debug);