Am 2022-01-05 um 11:16 a.m. schrieb Felix Kuehling: >> I was already wondering which mmaps through the KFD node we have left >> which cause problems here. > We still use the KFD FD for mapping doorbells and HDP flushing. These > are both SG BOs, so they cannot be CPU-mapped through render nodes. The > KFD FD is also used for mapping signal pages and CWSR trap handlers on > old APUs. > > Those VMAs aren't causing the problem. They still map successfully on > restore. > > Small correction: KFD already sets the VM_DONTCOPY flag for all KFD FD mappings. The patch under discussion here does the same for DRM FD mappings (at least for KFD BOs). Regards, Felix
