Am 2020-07-23 um 5:00 a.m. schrieb Christian König:
> We can't pipeline that during eviction because the memory needs
> to be available immediately.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index bc2230ecb7e3..122040056a07 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -651,8 +651,16 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
> placement.num_busy_placement = 0;
> bdev->driver->evict_flags(bo, &placement);
>
> - if (!placement.num_placement && !placement.num_busy_placement)
> - return ttm_bo_pipeline_gutting(bo);
> + if (!placement.num_placement && !placement.num_busy_placement) {
> + ttm_bo_wait(bo, false, false);
> +
> + ttm_tt_destroy(bo->ttm);
> +
> + memset(&bo->mem, 0, sizeof(bo->mem));
Where does the memory in the bo->mem (ttm_mem_reg) get destroyed? It
doesn't get attached to a ghost BO in this case, so someone will have to
call ttm_bo_mem_put explicitly before you wipe out bo->mem.
Regards,
Felix
> + bo->mem.mem_type = TTM_PL_SYSTEM;
> + bo->ttm = NULL;
> + return 0;
> + }
>
> evict_mem = bo->mem;
> evict_mem.mm_node = NULL;
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