On Thu, 9 Feb 2012 17:15:50 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > v3: Pimp commit message and make Chris Wilson less grumpy by adding a > module option. > +void i915_gem_init_ppgtt(struct drm_device *dev) > +{ > + drm_i915_private_t *dev_priv = dev->dev_private; > + uint32_t pd_offset; > + struct intel_ring_buffer *ring; > + int i; > + > + if (i915_enable_ppgtt && !HAS_ALIASING_PPGTT(dev)) > + return; > + This is quite a late check since we have already partitioned the aperture and run i915_gem_init_aliasing_ppgtt. I think the enable check should be done earlier and this check reduced to if (!dev_priv->mm.aliasing_ppgtt) return; Bah humbug! -Chris -- Chris Wilson, Intel Open Source Technology Centre