[RFC v3 3/3] drm/ttm/tests: Add tests for ttm_pool
Christian König
christian.koenig at amd.com
Tue Jul 4 06:57:54 UTC 2023
Am 04.07.23 um 08:50 schrieb Mauro Carvalho Chehab:
> On Mon, 3 Jul 2023 13:21:43 +0200
> Christian König <christian.koenig at amd.com> wrote:
>
>>> + /* We don't need this BO later, release it */
>>> + ttm_bo_put(bo);
>> That won't work. A BO must always outlive the TT object allocated for it.
>>
>> Otherwise you can get crashes during TT release.
> Just my two cents: shouldn't the TT object be increasing Kobj refcount then,
> in order to properly manage the BO object lifetime?
No, because you then get a circle reference.
The TT object is usually destroyed when the BO which is referencing it
is destroyed.
Regards,
Christian.
>
> Regards,
> Mauro
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