Re: [PATCH] dma-buf/fence: fix fence_is_later v2

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Op 29-02-16 om 23:13 schreef Gustavo Padovan:
> 2016-02-29 Alex Deucher <alexdeucher@xxxxxxxxx>:
>
>> From: Christian König <christian.koenig@xxxxxxx>
>>
>> A fence is never later than itself. This caused a bunch of overhead for AMDGPU.
>>
>> v2: simplify check as suggested by Michel.
>>
>> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
>> Reviewed-by: Michel Dänzer <michel.daenzer@xxxxxxx>
>> Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
>> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
>> ---
>>  include/linux/fence.h | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
> Reviewed-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
>
> 	Gustavo
Why is it causing overhead? Not really opposed to the patch though.
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