diff options
| -rw-r--r-- | kernel/sched.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 374f42170d6d..a2dd05435534 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -5250,6 +5250,18 @@ static struct ctl_table *sd_alloc_ctl_entry(int n) return entry; } +static void sd_free_ctl_entry(struct ctl_table **tablep) +{ + struct ctl_table *entry = *tablep; + + for (entry = *tablep; entry->procname; entry++) + if (entry->child) + sd_free_ctl_entry(&entry->child); + + kfree(*tablep); + *tablep = NULL; +} + static void set_table_entry(struct ctl_table *entry, const char *procname, void *data, int maxlen, @@ -5318,7 +5330,7 @@ static ctl_table *sd_alloc_ctl_cpu_table(int cpu) } static struct ctl_table_header *sd_sysctl_header; -static void init_sched_domain_sysctl(void) +static void register_sched_domain_sysctl(void) { int i, cpu_num = num_online_cpus(); struct ctl_table *entry = sd_alloc_ctl_entry(cpu_num + 1); @@ -5335,8 +5347,18 @@ static void init_sched_domain_sysctl(void) } sd_sysctl_header = register_sysctl_table(sd_ctl_root); } + +static void unregister_sched_domain_sysctl(void) +{ + unregister_sysctl_table(sd_sysctl_header); + sd_sysctl_header = NULL; + sd_free_ctl_entry(&sd_ctl_dir[0].child); +} #else -static void init_sched_domain_sysctl(void) +static void register_sched_domain_sysctl(void) +{ +} +static void unregister_sched_domain_sysctl(void) { } #endif @@ -6271,6 +6293,8 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map) err = build_sched_domains(&cpu_default_map); + register_sched_domain_sysctl(); + return err; } @@ -6287,6 +6311,8 @@ static void detach_destroy_domains(const cpumask_t *cpu_map) { int i; + unregister_sched_domain_sysctl(); + for_each_cpu_mask(i, *cpu_map) cpu_attach_domain(NULL, i); synchronize_sched(); @@ -6317,6 +6343,8 @@ int partition_sched_domains(cpumask_t *partition1, cpumask_t *partition2) if (!err && !cpus_empty(*partition2)) err = build_sched_domains(partition2); + register_sched_domain_sysctl(); + return err; } @@ -6448,8 +6476,6 @@ void __init sched_init_smp(void) /* XXX: Theoretical race here - CPU may be hotplugged now */ hotcpu_notifier(update_sched_domains, 0); - init_sched_domain_sysctl(); - /* Move init over to a non-isolated CPU */ if (set_cpus_allowed(current, non_isolated_cpus) < 0) BUG(); |