Re: [PATCH] MIPS: CPS: Optimise delay CPU calibration for SMP

["Jiaxun Yang" <jiaxun.yang@flygoat.com>]

在2025年5月22日周四 下午4:02，Gregory CLEMENT写道：
[...]
>
> I didn't notice this function initially, but upon closer inspection, it
> appears that although the scan process is optimized, it still performs a
> full scan for each CPU during boot. In contrast, with the mask, the
> information is created only once and within an existing loop.
>
> I believe this function would benefit from __cpu_primary_cluster_mask,
> which is why I prefer my current implementation over using
> mips_cps_first_online_in_cluster().

Thanks for clarification!

My concern is __cpu_primary_cluster_mask is pretty limited and the concept
of "primary cpu" is kind of fragile.

To optimize mips_cps_first_online_in_cluster I think the best way forward
would be produce cpumask for each cluster and perform cpumask_or with online
cpu mask at runtime. cluster_cpumask can be reused by other logic later.

Anyway, it's just my two cents.

Thanks
-- 
- Jiaxun