Hi, > Instead of delivering page flip events, we choose to post display vblank > event. Handling page flip events for both primary plane and cursor plane > may make user space quite busy, although we have the mask/unmask mechansim > for mitigation. Besides, there are some cases that guest app only uses > one framebuffer for both drawing and display. In such case, guest OS won't > do the plane page flip when the framebuffer is updated, thus the user > land won't be notified about the updated framebuffer. What happens when the guest is idle and doesn't draw anything to the framebuffer? cheers, Gerd
