Re: [PATCH] drm/amdgpu: Let userptr BO ttm have TTM_PAGE_FLAG_SG set

Am 20.05.21 um 05:15 schrieb xinhui pan: We have met memory corruption due to unexcepted swapout/swapin. swapout function create one swap storage which is filled with zero. And set ttm->page_flags as TTM_PAGE_FLAG_SWAPPED. But because userptr BO ttm has no backend page at that time, no real

Re: [PATCH] drm/amdgpu: Let userptr BO ttm have TTM_PAGE_FLAG_SG set

I think this works for KFD userptr BOs. But this problem is probably not specific to KFD. It's only most obvious with KFD because we rely so heavily for userptrs. I don't really understand why we're messing with TTM_PAGE_FLAG_SG in amdgpu_ttm_tt_populate and amdgpu_ttm_tt_unpopulate. And why are

[PATCH] drm/amdgpu: Let userptr BO ttm have TTM_PAGE_FLAG_SG set

We have met memory corruption due to unexcepted swapout/swapin. swapout function create one swap storage which is filled with zero. And set ttm->page_flags as TTM_PAGE_FLAG_SWAPPED. But because userptr BO ttm has no backend page at that time, no real data is swapout to swap storage. swapin