drm/amdgpu: place VRAM-capable dma-buf imports in the PREEMPT domain

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An imported dma-buf BO backed by a VRAM-capable exporter holds no host
pages of its own, yet when validated into TTM_PL_TT it is charged against
the GTT page budget; importing many such buffers can exhaust that budget
and fail with -ENOMEM even though no host memory is used. Set
AMDGPU_GEM_CREATE_PREEMPTIBLE on these imports so they land in the PREEMPT
domain instead, which is GTT-like and still bound (keeping the exporter
resident) but carries no host-page limit.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Mukul Joshi 2026-09-18 14:06:07 -04:00 • committed by Alex Deucher

parent 222627765a

commit 78cdd96ab4

1 changed files with 20 additions and 0 deletions

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

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