bo allocations for the below cases are after device memory allocation:
1. direct non-external mappable memory allocation
2. pool grow
3. exportable memory allocation
For (1) and (2), the bo is for mapping, which is a pure kernel operation
to happen later. So roundtrip waiting can be deferred until free memory.
For (3), the bo is for either fd export or mapping, which are both pure
kernel operations. So roundtrip waiting can also be deferred until free
memory.
Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13874>
86b3a4e6aa