Re: [PATCH v5 0/2] Add support for multiple coherent memory regions

[Andy Shevchenko]

On Mon, Mar 11, 2024 at 09:49:45AM +0000, Howard Yen wrote:
> In the system I'm working on, there is an always-on subsystem which
> includes a small size memory, and several functions need to run and
> occupy the memory from the small memory if they need to run on the
> always-on subsystem. These functions must allocate the memory from the
> small memory region, so that they can get benefit from the always-on
> subsystem. So the small memory is split for multiple functions which are
> satisfied with their generic use cases. But in specific use cases, like
> USB3 devices which support the stream trasnsfer or multiple devices
> connect to the host, they required more memory than their pre-allocated
> memory region. I tried to implement it in a generic way and propose this
> patch to give it the ability to get the memory from the other larger
> memory to solve the issue.

> Changelog
> --------------------------------------------
> Changes in v5:
> - Fix build break.
> - Use of_property_count_u32_elems() instead of
>   of_property_count_elems_of_size().

Have you tried to use --histogram diff algo?

-- 
With Best Regards,
Andy Shevchenko