Comment # 7 on bug 93460 from Christian König

(In reply to david1.zhou@amd.com from comment #6)
> Maybe we shall avoid to use fence for vmid, instead using LRU list.

Yeah, thought about that as well. The problem is that we used to have an LRU
list and I switched to fences because they had less overhead.

We still need to keep the fences around for synchronization, so I'm not sure if
that would really help.

The real price question is what is going wrong here?