We still need to figure out what that might look like and how likely it is that upstream will want it. We also have the possible alternative of using the dma buf extensions.

What's the context here?

This is the running Android Studio in a virtual machine with virtio-wayland project. The problem is that wayland client libraries (gtk, qt, xwayland) fall back to using buffers backed by shared memory allocated client-side. However, virtio-wayland requires server-side allocations to properly share memory with the host compositor. It's been proposed that wayland should have a built in way to have clients request a buffer be made server side, which would solve this problem.