drm/amdkfd: Handle incomplete migration to system memory

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If some pages fail to migrate to system memory, don't update
prange->actual_loc = 0. This prevents endless CPU page faults after
partial migration failures due to contested page locks.

Migration to RAM must be complete during migrations from VRAM to VRAM and
during evictions. Implement retry and fail if the migration to RAM fails.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Felix Kuehling 2021-10-27 19:24:46 -04:00 • committed by Alex Deucher

parent 12fcf0a7da

commit 740a451b07

2 changed files with 40 additions and 13 deletions

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45

drivers/gpu/drm/amd/amdkfd/kfd_migrate.c

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8

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

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