Chris Wilson <[email protected]> writes: > Neither the GPU or mmio pageflip ioctl stall due to outstanding rendering, > except as when it is required to rewrite the PTEs. We could move that to > a wq, or the buffers can be pre-emptively moved to the display cache > domain before rendering.
Right, it's reasonable for the kernel to not care whether the buffer is idle or not when flipping. However, the application *does* care, and so we need a way to not flip until rendering is complete. Whether that's additional mechanism in the kernel, or additional code up in user space is the question. -- [email protected]
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