[PATCH libdrm v2] amdgpu: Add memory over allocation test.

[Andrey Grodzovsky]

On 11/14/2017 03:44 AM, Christian König wrote:
> Am 13.11.2017 um 18:01 schrieb Andrey Grodzovsky:
>> Allocates 1 TB of memory. Test is disabled by default
>> since it's triggers OOM killer.
>>
>> v2:
>> FIx the test to only alloc the BO and assert if return value
>> not equal to -ENOMEM and remove test disable on start.
>>
>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>
> I was just about to scream that you need to fix the helper first, but 
> then I saw that you now directly use amdgpu_bo_alloc().
>
> The commit message could be changed and for the unlikely case that we 
> actually can allocate a BO of 1TB size we should free it.

The patch already does this

if (!r) {
         r = amdgpu_bo_free(bo);
         CU_ASSERT_EQUAL(r, 0);
     }

Thanks,
Andrey

>
> But apart from that the patch looks good to me and is Acked-by: 
> Christian König <christian.koenig at amd.com>.
>
> Regards,
> Christian.
>
>> ---
>>   tests/amdgpu/bo_tests.c | 24 ++++++++++++++++++++++++
>>   1 file changed, 24 insertions(+)
>>
>> diff --git a/tests/amdgpu/bo_tests.c b/tests/amdgpu/bo_tests.c
>> index 4545196..53e76c1 100644
>> --- a/tests/amdgpu/bo_tests.c
>> +++ b/tests/amdgpu/bo_tests.c
>> @@ -47,6 +47,7 @@ static void amdgpu_bo_export_import(void);
>>   static void amdgpu_bo_metadata(void);
>>   static void amdgpu_bo_map_unmap(void);
>>   static void amdgpu_memory_alloc(void);
>> +static void amdgpu_mem_fail_alloc(void);
>>     CU_TestInfo bo_tests[] = {
>>       { "Export/Import",  amdgpu_bo_export_import },
>> @@ -55,6 +56,7 @@ CU_TestInfo bo_tests[] = {
>>   #endif
>>       { "CPU map/unmap",  amdgpu_bo_map_unmap },
>>       { "Memory alloc Test",  amdgpu_memory_alloc },
>> +    { "Memory fail alloc Test",  amdgpu_mem_fail_alloc },
>>       CU_TEST_INFO_NULL,
>>   };
>>   @@ -244,3 +246,25 @@ static void amdgpu_memory_alloc(void)
>>       r = gpu_mem_free(bo, va_handle, bo_mc, 4096);
>>       CU_ASSERT_EQUAL(r, 0);
>>   }
>> +
>> +static void amdgpu_mem_fail_alloc(void)
>> +{
>> +    amdgpu_bo_handle bo;
>> +    int r;
>> +    struct amdgpu_bo_alloc_request req = {0};
>> +    amdgpu_bo_handle buf_handle;
>> +
>> +    /* Test impossible mem allocation, 1TB */
>> +    req.alloc_size = 0xE8D4A51000;
>> +    req.phys_alignment = 4096;
>> +    req.preferred_heap = AMDGPU_GEM_DOMAIN_VRAM;
>> +    req.flags = AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
>> +
>> +    r = amdgpu_bo_alloc(device_handle, &req, &buf_handle);
>> +    CU_ASSERT_EQUAL(r, -ENOMEM);
>> +
>> +    if (!r) {
>> +        r = amdgpu_bo_free(bo);
>> +        CU_ASSERT_EQUAL(r, 0);
>> +    }
>> +}
>
>