On Sat, Oct 8, 2011 at 7:19 PM, Parmenides <mobile.parmenides@xxxxxxxxx> wrote: > 2011/10/8 Chetan Nanda <chetannanda@xxxxxxxxx>: >> >> New task pick by scheduler may try to get the same lock resulting in >> deadlock > > It seems that this kind of deadlock may be removed eventually. Suppose > that we have a task A, which is holding a spinlock. If A is preempted > by task B which try to obtain the same spinlock. Although B has to > busy wait, it will end up with be preempted owing to using up its > timeslice. Therefore, A has chance to be selected by shechedler and > release the spinlock. Then, B will go on when it is selected by the > secheduler next time. Well, I think that if task B has higher priority than task A, then A would never have the chance to release the lock. thanks, Daniel. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
