diff options
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 2bac5ea2c9af..d71a5f2bd7b2 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -203,17 +203,27 @@ static int __cpuinit tick_nohz_cpu_down_callback(struct notifier_block *nfb, */ static char __initdata nohz_full_buf[NR_CPUS + 1]; -static int __init init_tick_nohz_full(void) +void __init tick_nohz_init(void) { - if (have_nohz_full_mask) - cpu_notifier(tick_nohz_cpu_down_callback, 0); + int cpu; + + if (!have_nohz_full_mask) + return; + + cpu_notifier(tick_nohz_cpu_down_callback, 0); + + /* Make sure full dynticks CPU are also RCU nocbs */ + for_each_cpu(cpu, nohz_full_mask) { + if (!rcu_is_nocb_cpu(cpu)) { + pr_warning("NO_HZ: CPU %d is not RCU nocb: " + "cleared from nohz_full range", cpu); + cpumask_clear_cpu(cpu, nohz_full_mask); + } + } cpulist_scnprintf(nohz_full_buf, sizeof(nohz_full_buf), nohz_full_mask); pr_info("NO_HZ: Full dynticks CPUs: %s.\n", nohz_full_buf); - - return 0; } -core_initcall(init_tick_nohz_full); #else #define have_nohz_full_mask (0) #endif |