Il 21/05/2012 03:56, Benjamin Herrenschmidt ha scritto: > I don't see an obvious need to provide a "relaxed" variant of the > later at this stage, a quick grep doesn't seem to show that most cases > where it's used are either not performance sensitive or the barrier > makes sense, but feel free to prove me wrong :-)
The only problem here is that you have useless memory barriers when calling cpu_physical_memory_map in a loop (see virtqueue_map_sg). Paolo
