recovery_delay
if (recovery_phase < ARRAY_SIZE(recovery_delay) - 1)
recovery_delay[recovery_phase] * HZ);
mod_timer(&recovery_timer, jiffies + recovery_delay[0] * HZ);
static const unsigned long recovery_delay[] = { 3, 30, 300 };
recovery_delay();
recovery_delay();
fast_iob(); recovery_delay();
recovery_delay();
recovery_delay();
recovery_delay();