drm/amdkfd: support concurrent userptr update for HMM

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Userptr restore may have concurrent userptr invalidation after
hmm_vma_fault adds the range to the hmm->ranges list, needs call
hmm_vma_range_done to remove the range from hmm->ranges list first,
then reschedule the restore worker. Otherwise hmm_vma_fault will add
same range to the list, this will cause loop in the list because
range->next point to range itself.

Add function untrack_invalid_user_pages to reduce code duplication.

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>

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Philip Yang 2019-03-04 14:10:12 -05:00 • committed by Alex Deucher

parent 1bd4e4ca7b

commit 386a68e786

1 changed files with 19 additions and 6 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

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