diff options
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index e10a4af88737..828b091501ca 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -751,7 +751,7 @@ static ktime_t tick_nohz_next_event(struct tick_sched *ts, int cpu) * Aside of that check whether the local timer softirq is * pending. If so its a bad idea to call get_next_timer_interrupt() * because there is an already expired timer, so it will request - * immeditate expiry, which rearms the hardware timer with a + * immediate expiry, which rearms the hardware timer with a * minimal delta which brings us back to this place * immediately. Lather, rinse and repeat... */ @@ -973,7 +973,7 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts) if (unlikely(local_softirq_pending())) { static int ratelimit; - if (ratelimit < 10 && + if (ratelimit < 10 && !local_bh_blocked() && (local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK)) { pr_warn("NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #%02x!!!\n", (unsigned int) local_softirq_pending()); @@ -1124,7 +1124,11 @@ ktime_t tick_nohz_get_next_hrtimer(void) * tick_nohz_get_sleep_length - return the expected length of the current sleep * @delta_next: duration until the next event if the tick cannot be stopped * - * Called from power state control code with interrupts disabled + * Called from power state control code with interrupts disabled. + * + * The return value of this function and/or the value returned by it through the + * @delta_next pointer can be negative which must be taken into account by its + * callers. */ ktime_t tick_nohz_get_sleep_length(ktime_t *delta_next) { |