diff options
| -rw-r--r-- | kernel/watchdog.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index e74d48bc3e61..6c489e49c610 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -24,6 +24,7 @@ #include <asm/irq_regs.h> #include <linux/kvm_para.h> #include <linux/perf_event.h> +#include <linux/kthread.h> /* * The run state of the lockup detectors is controlled by the content of the @@ -664,6 +665,41 @@ static struct smp_hotplug_thread watchdog_threads = { .unpark = watchdog_enable, }; +/* + * park all watchdog threads that are specified in 'watchdog_cpumask' + */ +static int watchdog_park_threads(void) +{ + int cpu, ret = 0; + + get_online_cpus(); + for_each_watchdog_cpu(cpu) { + ret = kthread_park(per_cpu(softlockup_watchdog, cpu)); + if (ret) + break; + } + if (ret) { + for_each_watchdog_cpu(cpu) + kthread_unpark(per_cpu(softlockup_watchdog, cpu)); + } + put_online_cpus(); + + return ret; +} + +/* + * unpark all watchdog threads that are specified in 'watchdog_cpumask' + */ +static void watchdog_unpark_threads(void) +{ + int cpu; + + get_online_cpus(); + for_each_watchdog_cpu(cpu) + kthread_unpark(per_cpu(softlockup_watchdog, cpu)); + put_online_cpus(); +} + static void restart_watchdog_hrtimer(void *info) { struct hrtimer *hrtimer = raw_cpu_ptr(&watchdog_hrtimer); |