Requirements to merge new heaps in the kernel

[metux]

On 22.10.24 10:38, Maxime Ripard wrote:

Hi,

> I'm still interested in merging a carve-out driver[1], since it seems to be
> in every vendor BSP and got asked again last week.
>
> I remember from our discussion that for new heap types to be merged, we
> needed a kernel use-case. Looking back, I'm not entirely sure how one
> can provide that given that heaps are essentially facilities for
> user-space.

For those who didn't follow your work, could you please give a short
intro what's that all about ?

If I understand you correctly, you'd like the infrastructure of
kmalloc() et al for things / memory regions that aren't the usual heap,
right ?

What's the practical use case ? GPU memory ? Shared memory between
nodes in a multi-CPU / cluster machine ?

Is it related to NUMA ?


thx
--mtx