ajax: The consumer of this will be software renderers. We're working on one right now that will be using dma-bufs from userspace. Daniel: Thanks for your suggestions. I'll work on it and submit a v2. <div class="gmail_quote">On Fri Nov 21 2014 at 6:02:45 AM Adam Jackson <<a href="mailto:ajax@redhat.com">ajax@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Thu, 2014-11-20 at 16:26 -0800, Zach Reizner wrote: > This patch implements the virtual GEM driver with PRIME sharing which > allows vgem to import a gem object from other drivers for the purpose > of mmap-ing them to userspace. The reason I initially wanted this was to get zero-copy llvmpipe, since (besides making GLX conformance impossible) the image transfer parts of drisw are easily the biggest part of the runtime overhead. Is there a userspace consumer of this anywhere? - ajax </blockquote></div>