Spinlocks, semaphores & Mutexes defnitely can't be used. Although the RW semaphores and RW spinlocks allow recursive locking (since multiple threads can simultaneously hold reader locks). --------------- response from Gaurav Dhiman starts ----------------------- Rajat read-write locks are not recursive in nature, as the same thread can not again acquire the lock once it has already acquired the lock. There are no recursive lock avaialble and should not be avialable, as recursive locks lead to deadlock. When thread tries to acquire the lock for second time recursively, it will be put on hold or spin forever waiting for the lock to be release which the thread has itself acquired, leading it to deadlock. regards, Gaurav ------------------- response from Gaurav Dhiman ends --------------------
Hi Gaurav, Umm ... pardon my ignorance, but I cannot imagine why a process cannot again attempt to acquire the read lock (read_lock()) without getting deadlocked ... although it won't MAKE any sense to reacquire a read lock. Thanks Rajat -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
