I think I need to avoid waiting queues all together.. On Sat, Jan 28, 2017 at 7:42 PM, Andy Ng <andreas2025@xxxxxxxxx> wrote: > This is an rt_mutex in RT, non threaded IRS can't sleep, the waiting > queue is locked by an rt_mutex. > Any better ideas combining non threaded ISR with wake_up calls? > > On Fri, Jan 27, 2017 at 10:37 PM, Julia Cartwright <julia@xxxxxx> wrote: >> On Fri, Jan 27, 2017 at 10:25:08PM +0000, Andy Ng wrote: >>> the wake_up from a non threaded isr in RT will end up to try to get >>> the spin_lock of of that wait_queue, but this kind of locking in not >>> allowed in non threaded isr and therefore the use of wake_up_locked >>> does not touches the spin_locks of the queue... and it seems to work >> >> And, have you convinced yourself that this is a safe operation to >> perform without taking the lock? >> >> In other words, how are you preventing this interrupt from firing when a >> thread is in process of manipulating the wake queue? >> >> Julia >> >> PS. There is a "simple" waitqueue implementation which may or may not >> fit what you want to do. -- 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
