static unsigned long wq_watchdog_touched = INITIAL_JIFFIES;
static DEFINE_PER_CPU(unsigned long, wq_watchdog_touched_cpu) = INITIAL_JIFFIES;
+static unsigned int wq_panic_on_stall;
+module_param_named(panic_on_stall, wq_panic_on_stall, uint, 0644);
+
/*
* Show workers that might prevent the processing of pending work items.
* The only candidates are CPU-bound workers in the running state.
rcu_read_unlock();
}
+static void panic_on_wq_watchdog(void)
+{
+ static unsigned int wq_stall;
+
+ if (wq_panic_on_stall) {
+ wq_stall++;
+ BUG_ON(wq_stall >= wq_panic_on_stall);
+ }
+}
+
static void wq_watchdog_reset_touched(void)
{
int cpu;
if (cpu_pool_stall)
show_cpu_pools_hogs();
+ if (lockup_detected)
+ panic_on_wq_watchdog();
+
wq_watchdog_reset_touched();
mod_timer(&wq_watchdog_timer, jiffies + thresh);
}