On Tue 26-01-21 11:25:36, Minchan Kim wrote:

On Tue, Jan 26, 2021 at 08:46:05AM +0100, Michal Hocko wrote:

quoted

On Thu 21-01-21 09:55:02, Minchan Kim wrote:

quoted

From: Hyesoo Yu <redacted>

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@linaro.org/T/#m3dc63acd33fea269a584f43bb799a876f0b2b45d (local)

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