omapdrm + etnaviv memory leak

[Tomi Valkeinen]

Hi Lucas,

On 23/05/18 11:53, Lucas Stach wrote:

>> With each run, I can see buffers being left lying around, visible in
>> both omapdrm's and etnaviv's 'gem' debugfs file. And they're there
>> even after killing X.
>>
>> If I try to rmmod etnaviv, I get the warnings below. Unloading
>> omapdrm is not possible, as it's being referenced by something
>> (presumably by etnaviv having imported omapdrm's dmabufs).
>>
>> I haven't debugged this much yet, but we do use dmabuf import &
>> export successfully with omapdrm and v4l2. Has etnaviv dmabuf
>> import/export been tested?
> 
> Yes, dma-buf import/export with etnaviv is extensively being used, as
> we need to work with imx-drm on the scanout side and a V4L2 driven VPU
> for video-decode.

I managed to create a simple test case for this, and I can see the leak
happen without omapdrm too, with etna + vgem combination.

https://github.com/tomba/kmsxx/blob/etna-debug/utils/buftest.cpp

With etna_bo_map(), buffers leak.

 Tomi

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