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drm/amdgpu: add limitation for dedicated vm number v4

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Limit reserved vmids to 1 to avoid taking too many
out of commission and starving the system.

v2: move #define to amdgpu_vm.h
v3: move reserved vmid counter to id_manager,
and increase counter before allocating vmid
v4: rename to reserved_vmid_num

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chunming Zhou
2017-04-21 15:51:04 +08:00
committed by Alex Deucher
parent 1e9ef26fb3
commit c350577073
2 changed files with 12 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
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@@ -84,6 +84,8 @@ struct amdgpu_bo_list_entry;
/* hardcode that limit for now */
#define AMDGPU_VA_RESERVED_SIZE (8 << 20)
/* max vmids dedicated for process */
#define AMDGPU_VM_MAX_RESERVED_VMID 1
struct amdgpu_vm_pt {
struct amdgpu_bo *bo;
@@ -154,6 +156,7 @@ struct amdgpu_vm_id_manager {
unsigned num_ids;
struct list_head ids_lru;
struct amdgpu_vm_id ids[AMDGPU_NUM_VM];
atomic_t reserved_vmid_num;
};
struct amdgpu_vm_manager {