static int watchdog(void *dummy)
{
unsigned long hung_last_checked = jiffies;
set_user_nice(current, 0);
for ( ; ; )
{
unsigned long timeout = sysctl_hung_task_timeout_secs;
unsigned long interval = sysctl_hung_task_check_interval_secs;
interval = min_t(unsigned long, interval, timeout);
t = hung_timeout_jiffies(hung_last_checked, interval);
if (t <= 0)
{
if (!atomic_xchg(&reset_hung_task, 0) &&!hung_detector_suspended)
check_hung_uninterruptible_tasks(timeout);
hung_last_checked = jiffies;
continue;
}
schedule_timeout_interruptible(t);
}
return 0;
}
原文:https://www.cnblogs.com/longbowchi/p/14825136.html