On Fri, Nov 20, 2015 at 05:05:05PM +0200, Ville Syrjälä wrote: > On Fri, Nov 20, 2015 at 10:55:58AM +0000, Chris Wilson wrote: > > Since we blow the TLB caches by using kmap/kunmap, we may as well go the > > whole hog and see if declaring our destination page as WC is faster than > > keeping it as WB and using clflush. It should be! > > Is this description for another patch? I can't see any WC stuff in > there. No, just badly written. (Admittedly at one point I did experiment with remapping the pages as WC and discovered that did stop_macheine()...) drm/i915: Perform inline clflushes from the command parser On incoherent architectures, we can avoid having to clflush the destination shadow batch as a separate pass by inlining the call to clflush whilst we already have the kmap_atomic() around for the page. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
