Commit-ID: 9469eb01db891b55367ee7539f1b9f7f6fd2819d Gitweb: http://git.kernel.org/tip/9469eb01db891b55367ee7539f1b9f7f6fd2819d Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Thu, 7 Sep 2017 17:03:53 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 12 Sep 2017 17:41:04 +0200
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) <pet...@infradead.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20170907150614.142924...@infradead.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/debug.c | 5 +++++ kernel/sched/sched.h | 2 ++ 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 4a23bbc..b19d06ea 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 ab1c7f5..7ea2a03 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 6f7b439..2ab2aa6 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; }
