[HELP] Request for assistance to upstream an Android memory optimization (Multi_Freearea)

[HELP] Request for assistance to upstream an Android memory optimization (Multi_Freearea)

[Infinity]

Hello,

I am a non-technical user who came across an interesting memory optimization
in the Android kernel tree, and I'm seeking guidance on whether/how it might
be considered for upstream inclusion.

Optimization: Multi_Freearea
Link: https://android-review.googlesource.com/c/kernel/common/+/2942530

Brief description:
- Divides memory into segments by PFN range to reduce external fragmentation
- Tested on Android with kernel 5.10, showing 95.6% reduction in COMPACTSTALL
- Author: lipeifeng from OPPO

As I'm not a kernel developer, I'm reaching out to ask:
1. Is this type of optimization potentially suitable for mainline?
2. What would be the proper process to have it evaluated?
3. Could someone with expertise in memory management take a look?

I understand this may not be the typical technical patch submission, but I
believe the optimization has merit and wanted to bring it to attention.

Thank you for any guidance you can provide.

Sincerely,
John

Re: [HELP] Request for assistance to upstream an Android memory optimization (Multi_Freearea)

[Matthew Wilcox]

On Sun, Jan 18, 2026 at 04:58:36PM +0800, Infinity wrote:
> I am a non-technical user who came across an interesting memory optimization
> in the Android kernel tree, and I'm seeking guidance on whether/how it might
> be considered for upstream inclusion.

https://lore.kernel.org/linux-mm/20210414023803.937-1-lipeifeng@oppo.com/