> How do you ensure that no device can do DMA on the buffer while it's mapped > into user space in a noncoherent manner? Why do we want to enforce that ? We provide the appropriate base service but you need to know what you are doing. In reality a lot of use cases are going to need far more than a simple kernel API could try and guess coherency rules about. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel