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drm/amd/amdgpu: not allow gtt size exceed 75%*system memory size 

keep consistency with threshold of swapout

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Roger He <Hongbo.He@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roger He 2017-11-10 19:05:13 +08:00 committed by Alex Deucher
parent 02bab92328
commit 424e2c8580
1 changed files with 8 additions and 3 deletions
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11
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@ -1330,9 +1330,14 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
(unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
if (amdgpu_gtt_size == -1)
gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
adev->mc.mc_vram_size);
if (amdgpu_gtt_size == -1) {
struct sysinfo si;
si_meminfo(&si);
gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
adev->mc.mc_vram_size),
((uint64_t)si.totalram * si.mem_unit * 3/4));
}
else
gtt_size = (uint64_t)amdgpu_gtt_size << 20;
r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);