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Commit 9469eb01 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

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: default avatarPeter 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: default avatarIngo Molnar <mingo@kernel.org>
parent 4ff9083b

kernel/sched/debug.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

kernel/sched/sched.h

+2 −0
Original line number Diff line number Diff line
@@ -1954,6 +1954,8 @@ extern struct sched_entity *__pick_first_entity(struct cfs_rq *cfs_rq); 
extern struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq);



#ifdef	CONFIG_SCHED_DEBUG

extern bool sched_debug_enabled;



extern void print_cfs_stats(struct seq_file *m, int cpu);

extern void print_rt_stats(struct seq_file *m, int cpu);

extern void print_dl_stats(struct seq_file *m, int cpu);

kernel/sched/topology.c

+1 −3
Original line number Diff line number Diff line
@@ -14,11 +14,9 @@ cpumask_var_t sched_domains_tmpmask2; 


#ifdef CONFIG_SCHED_DEBUG



static __read_mostly int sched_debug_enabled;



static int __init sched_debug_setup(char *str)

{

	sched_debug_enabled = 1;

	sched_debug_enabled = true;



	return 0;

}