(In reply to comment #28)
> > I submitted the change reverting the behaviour of PIPE_USAGE_STREAM for
> > review, but it's strange: I couldn't notice any significant difference in
> > stutter in Valley regardless of any of these changes.

Also, according to
GALLIUM_HUD=requested-VRAM+VRAM-usage,requested-GTT+GTT-usage, Valley only
seems to allocate about 10-20 MB for streaming BOs, so I'm not sure why putting
them in VRAM or not makes such a big difference for you.

> > BTW, what CPU are you using?
> 
> It's an AMD Phenom II x4 965be.

I assume the chipset for that doesn't support PCIe 3.0, does it? I wonder if
maybe streaming BOs should be in VRAM with PCIe 3.0 but not with PCIe 2.0.