5 Sep
2019
5 Sep
'19
7 a.m.
Hi,
- imo we should fix this by using the io_mapping stuff, that avoids
the overhead of repeated pat checks for map/unmap.
Another idea: IIRC ttm has a move_notify callback. So we could simply keep mappings active even when the refcount goes down to zero. Then do the actual unmap either in the move_notify or in the destroy callback.
cheers, Gerd