* Steven Rostedt | 2013-03-18 15:12:49 [-0400]: >In -rt, most spin_locks() turn into mutexes. One of these spin_lock >conversions is performed on the workqueue gcwq->lock. When the idle >worker is worken, the first thing it will do is grab that same lock and >it too will block, possibly jumping into the same code, but because >nr_running would already be decremented it prevents an infinite loop. > >But this is still a waste of CPU cycles, and it doesn't follow the method >of mainline, as new workers should only be woken when a worker thread is >truly going to sleep, and not just blocked on a spin_lock(). > >Check the saved_state too before waking up new workers. > >Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Taking for v3.8-rt. Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
