From 924dda024f3bea64be5f3ac067a075e466739dc9 Mon Sep 17 00:00:00 2001 From: Samuel Zhang Date: Thu, 10 Jul 2025 14:23:10 +0800 Subject: [PATCH 4338/5403] drm/amdgpu: move GTT to shmem after eviction for hibernation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Christian König Link: https://lore.kernel.org/r/20250710062313.3226149-3-guoqing.zhang@amd.com Signed-off-by: Mario Limonciello --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index d282c0753b14..723ab95d8c48 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -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; } -- 2.54.0