Re: [PATCH v4 4/4] dma-buf: heaps: add chunk heap to dmabuf heaps

[Michal Hocko]

On Tue 26-01-21 11:25:36, Minchan Kim wrote:
> On Tue, Jan 26, 2021 at 08:46:05AM +0100, Michal Hocko wrote:
> > On Thu 21-01-21 09:55:02, Minchan Kim wrote:
> > > From: Hyesoo Yu <hyesoo.yu@xxxxxxxxxxx>
> > > 
> > > This patch supports chunk heap that allocates the buffers that
> > > arranged into a list a fixed size chunks taken from CMA.
> > > 
> > > The chunk heap driver is bound directly to a reserved_memory
> > > node by following Rob Herring's suggestion in [1].
> > > 
> > > [1] https://lore.kernel.org/lkml/20191025225009.50305-2-john.stultz@xxxxxxxxxx/T/#m3dc63acd33fea269a584f43bb799a876f0b2b45d
> > 
> > Who is using this allocator in the kernel?
> 
> Userspace uses the memory via mapping it via dmabuf.

Ohh, I see. I thought this was an interface to consume in the kernel.
Thanks for the clarification!

-- 
Michal Hocko
SUSE Labs