[Intel-gfx] [PATCH 0/3] drm/helpers: Make the suballocation manager drm generic.

[Maarten Lankhorst]

Op 23-02-2022 om 16:11 schreef Christian König:
> Am 23.02.22 um 14:51 schrieb Maarten Lankhorst:
>> Second version of the patch. I didn't fix the copyright (which ame up
>> in the previous version), as I feel the original author should send a
>> patch for that.
>>
>> I've made the suballocator into its own module, and did a cleanup pass on it.
>> The suballocator is generic enough to be useful for any resource that can be
>> subdivided and is guarded by a completion fence.
>
> Well the main issue is still that you removed the per allocation alignment.
>
> For amdgpu that is not much of a problem, but for radeon that could cause massive issues with UVD semaphore synchronization. 

Hey,

Is this really a problem? I made the per allocation alignment fixed and set it to the higher of the 2 places it's used in by radeon. This just means that slightly more memory might be allocated to each suballocation. This shouldn't cause any problem. It would reserve 256 bytes for a semaphore allocation, instead of 8.

~Maarten