On 08/01/2011 10:22 PM, Alan Cox wrote: > On Mon, 1 Aug 2011 20:47:42 +0100 > Dave Airlie <airlied@xxxxxxxxx> wrote: > >>> >>> Hmmm, what's about the opposite approach? >>> To me, it sounds simpler and more logical when the kernel always creates >>> one device node per output (or maybe dynamically per connected output), >>> without any need for configuration or device assignment. >> >> It just doesn't fit in with how the drm device nodes work, like it might seem >> simpler in the kernel but I think it would just complicate userspace. > > It also doesn't fit some cases of reality (eg the USB displaylink stuff) > where the output and the GPU are effectively decoupled. > > There are also some interesting security issues with a lot of GPUs where > you'd be very very hard pushed to stop one task spying on the display of > another as there isn't much in the way of MMU contexts on the GPU side. > Actually, >= GeForce8 have proper (and working) virtual memory, i.e. per-context page directory and page tables. > Alan > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
