diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2017-09-07 17:03:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-12 17:41:04 +0200 |
| commit | 9469eb01db891b55367ee7539f1b9f7f6fd2819d (patch) | |
| tree | dfe475d30b69b6e43b8ed1be0505f08123fee653 /kernel | |
| parent | sched/core: WARN() when migrating to an offline CPU (diff) | |
| download | linux-9469eb01db891b55367ee7539f1b9f7f6fd2819d.tar.xz linux-9469eb01db891b55367ee7539f1b9f7f6fd2819d.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/debug.c | 5 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 2 | ||||
| -rw-r--r-- | kernel/sched/topology.c | 4 |
3 files changed, 8 insertions, 3 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); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index ab1c7f5409a0..7ea2a0339771 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -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); diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 6f7b43982f73..2ab2aa68c796 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -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; } |