diff options
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/poll_state.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c index 7416b16287de..68cdc506524b 100644 --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -6,15 +6,24 @@ #include <linux/cpuidle.h> #include <linux/sched.h> +#include <linux/sched/clock.h> #include <linux/sched/idle.h> +#define POLL_IDLE_TIME_LIMIT (TICK_NSEC / 16) + static int __cpuidle poll_idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { + u64 time_start = local_clock(); + local_irq_enable(); if (!current_set_polling_and_test()) { - while (!need_resched()) + while (!need_resched()) { cpu_relax(); + + if (local_clock() - time_start > POLL_IDLE_TIME_LIMIT) + break; + } } current_clr_polling(); |