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| author | Philip Yang <Philip.Yang@amd.com> | 2022-07-26 22:13:30 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-09-13 19:54:23 +0300 |
| commit | c969c5fd21fd700b126aa139ec57875697946474 (patch) | |
| tree | 91985e7bd6a9a223fa924488837281c5204187d8 /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | e1f84eef313f4820cca068a238c645d0a38c6a9b (diff) | |
| download | linux-c969c5fd21fd700b126aa139ec57875697946474.tar.xz | |
drm/amdkfd: Remove prefault before migrating to VRAM
Prefaulting potentially allocates system memory pages before a
migration. This adds unnecessary overhead. Instead we can skip
unallocated pages in the migration and just point migrate->dst to a
0-initialized VRAM page directly. Then the VRAM page will be inserted
to the PTE. A subsequent CPU page fault will migrate the page back to
system memory.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
0 files changed, 0 insertions, 0 deletions