Changli Gao <xiaosuo@xxxxxxxxx> wrote: > I don't know how to do that, as maybe there are non-exclusive and > exclusive wait queues in the same wait queue head. If we want to > enqueue exclusive wait queues at the head of exclusive queues, we have > to know where the head is, otherwise, we have to loop to find the head > when enqueuing. I suspect you really want to have the semantics defined per-queue. _Either_ a queue is FIFO (such as processes waiting for a resource so they can do something with it) _or_ it is LIFO (such as a pool of processes waiting to be given work). How often do the two actually mix? And if they do, is that really an error? David -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
