TTM create two zones, kernel zone and dma32 zone for system memory. If system memory address allocated is below 4GB, this account to dma32 zone and will exhaust dma32 zone and trigger unnesssary TTM eviction. Patch "drm/ttm: Account for kernel allocations in kernel zone only" only handle the allocation for acc_size, the system memory page allocation is through ttm_mem_global_alloc_page which still account to dma32 zone if page is below 4GB. Change-Id: I289b85d891b8f64a1422c42b1eab398098ab7ef7 Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 2778ff63d97d..79bb9dfe617b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1686,6 +1686,10 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) } adev->mman.initialized = true; + /* Only kernel zone (no dma32 zone) if device does not require dma32 */ + if (!adev->need_dma32) + adev->mman.bdev.glob->mem_glob->num_zones = 1; + /* We opt to avoid OOM on system pages allocations */ adev->mman.bdev.no_retry = true; -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
