https://bugs.freedesktop.org/show_bug.cgi?id=81644
--- Comment #119 from Alexandre Demers alexandre.f.demers@gmail.com --- Small question Alex Deucher or Christian may answer: is it normal ring 5 is completely in a different GPU's memory address area? [ 9.353518] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x00000000c0000c00 and cpu addr 0xffff880411a25c00 [ 9.353519] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x00000000c0000c04 and cpu addr 0xffff880411a25c04 [ 9.353521] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x00000000c0000c08 and cpu addr 0xffff880411a25c08 [ 9.353522] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x00000000c0000c0c and cpu addr 0xffff880411a25c0c [ 9.353524] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x00000000c0000c10 and cpu addr 0xffff880411a25c10 [ 9.356425] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffc90015fb5a18
rings 0 to 4 are all in the same gpu address subset, but not ring 5?