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drm/amdgpu: move GTT to shmem after eviction for hibernation

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When hibernate with data center dGPUs, huge number of VRAM BOs evicted
to GTT and takes too much system memory. This will cause hibernation
fail due to insufficient memory for creating the hibernation image.

Move GTT BOs to shmem in KMD, then shmem to swap disk in kernel
hibernation code to make room for hibernation image.

Signed-off-by: Samuel Zhang <guoqing.zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250710062313.3226149-3-guoqing.zhang@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Samuel Zhang 2025-07-10 14:23:10 +08:00 committed by Mario Limonciello
parent 40b6a946d2
commit 924dda024f
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -5029,8 +5029,16 @@ static int amdgpu_device_evict_resources(struct amdgpu_device *adev)
return 0;
ret = amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM);
if (ret)
if (ret) {
dev_warn(adev->dev, "evicting device resources failed\n");
return ret;
}
if (adev->in_s4) {
ret = ttm_device_prepare_hibernation(&adev->mman.bdev);
if (ret)
dev_err(adev->dev, "prepare hibernation failed, %d\n", ret);
}
return ret;
}