diff options
| -rw-r--r-- | include/linux/context_tracking.h | 2 | ||||
| -rw-r--r-- | kernel/context_tracking.c | 5 | ||||
| -rw-r--r-- | kernel/time/tick-sched.c | 6 |
3 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index d883ff0..1ae37c7 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -34,6 +34,8 @@ static inline bool context_tracking_active(void) return __this_cpu_read(context_tracking.active); } +extern void context_tracking_cpu_set(int cpu); + extern void user_enter(void); extern void user_exit(void); diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 7b095de..72bcb25 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -26,6 +26,11 @@ DEFINE_PER_CPU(struct context_tracking, context_tracking) = { #endif }; +void context_tracking_cpu_set(int cpu) +{ + per_cpu(context_tracking.active, cpu) = true; +} + /** * user_enter - Inform the context tracking that the CPU is going to * enter userspace mode. diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 9563c74..91a2528 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -23,6 +23,7 @@ #include <linux/irq_work.h> #include <linux/posix-timers.h> #include <linux/perf_event.h> +#include <linux/context_tracking.h> #include <asm/irq_regs.h> @@ -344,11 +345,16 @@ static int tick_nohz_init_all(void) void __init tick_nohz_init(void) { + int cpu; + if (!have_nohz_full_mask) { if (tick_nohz_init_all() < 0) return; } + for_each_cpu(cpu, nohz_full_mask) + context_tracking_cpu_set(cpu); + cpu_notifier(tick_nohz_cpu_down_callback, 0); cpulist_scnprintf(nohz_full_buf, sizeof(nohz_full_buf), nohz_full_mask); pr_info("NO_HZ: Full dynticks CPUs: %s.\n", nohz_full_buf); |
