Hi, I'm looking to reduce contention for the ep->lock spin lock in epoll.
I came across wfcqueue in Userspace RCU and am wondering if there's any reason (other that lack of developer time/users) it hasn't been adapted for the Linux kernel. I'd be happy to do the work if it's suitable (and omit parts which may not be, such as busy wait). Using a mutex lock (while in process context) for dequeue works for epoll. I mainly want a lock-free enqueue for ep_poll_callback since that may be called in IRQ context. I suppose I can also use the llist LIFO in ep_poll_callback and reverse that while in process context, too... ref: http://git.lttng.org/userspace-rcu.git -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
