On Thu, 04/20 14:00, Paolo Bonzini wrote:
> + if (atomic_cmpxchg(&mutex->locked, waiters, waiters + 1) != waiters) {
Is it still useful to try the fast path again if there are now even more
waiters, i.e. "atomic_cmpxchg(...) > waiters"?
> + goto retry_fast_path;
> + }
> +
> + qemu_co_mutex_lock_slowpath(ctx, mutex);
> + qemu_co_mutex_unlock(mutex);
> +}
> +
> void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex)
> {
> Coroutine *self = qemu_coroutine_self();
> --
> 2.9.3
>
>
>
