diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-10 11:24:39 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-10 11:24:39 -0700 |
commit | 60e383037ba192d86fc0110b5b5a9a2013d83b13 (patch) | |
tree | 14618b9efcd260f1987fc8003228dd0838130a91 /kernel/sched/core.c | |
parent | 7fcbc230c6f0ee96d397e30d061ef4995879b835 (diff) | |
parent | 4698f88c06b893f2acc0b443004a53bf490fde7c (diff) |
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Two scheduler debugging fixes"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/debug: Fix 'schedstats=enable' cmdline option
sched/debug: Fix /proc/sched_debug regression
Diffstat (limited to 'kernel/sched/core.c')
-rw-r--r-- | kernel/sched/core.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 7f2cae4620c7..385c947482e1 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2253,9 +2253,11 @@ int sysctl_numa_balancing(struct ctl_table *table, int write, #endif #endif +#ifdef CONFIG_SCHEDSTATS + DEFINE_STATIC_KEY_FALSE(sched_schedstats); +static bool __initdata __sched_schedstats = false; -#ifdef CONFIG_SCHEDSTATS static void set_schedstats(bool enabled) { if (enabled) @@ -2278,11 +2280,16 @@ static int __init setup_schedstats(char *str) if (!str) goto out; + /* + * This code is called before jump labels have been set up, so we can't + * change the static branch directly just yet. Instead set a temporary + * variable so init_schedstats() can do it later. + */ if (!strcmp(str, "enable")) { - set_schedstats(true); + __sched_schedstats = true; ret = 1; } else if (!strcmp(str, "disable")) { - set_schedstats(false); + __sched_schedstats = false; ret = 1; } out: @@ -2293,6 +2300,11 @@ out: } __setup("schedstats=", setup_schedstats); +static void __init init_schedstats(void) +{ + set_schedstats(__sched_schedstats); +} + #ifdef CONFIG_PROC_SYSCTL int sysctl_schedstats(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) @@ -2313,8 +2325,10 @@ int sysctl_schedstats(struct ctl_table *table, int write, set_schedstats(state); return err; } -#endif -#endif +#endif /* CONFIG_PROC_SYSCTL */ +#else /* !CONFIG_SCHEDSTATS */ +static inline void init_schedstats(void) {} +#endif /* CONFIG_SCHEDSTATS */ /* * fork()/clone()-time setup: @@ -7487,6 +7501,8 @@ void __init sched_init(void) #endif init_sched_fair_class(); + init_schedstats(); + scheduler_running = 1; } |