Re: [PATCH 02/10] cacheinfo: calculate per-CPU data cache size

[Sudeep Holla]

On Wed, Sep 20, 2023 at 02:18:48PM +0800, Huang Ying wrote:
> Per-CPU data cache size is useful information.  For example, it can be
> used to determine per-CPU cache size.  So, in this patch, the data
> cache size for each CPU is calculated via data_cache_size /
> shared_cpu_weight.
>
> A brute-force algorithm to iterate all online CPUs is used to avoid
> to allocate an extra cpumask, especially in offline callback.
>

You have not mentioned who will use this information ? Looking at the
change, it is not exposed to the user-space. Also I see this is actually
part of the series [1]. Is this info used in any of those patches ? Can you
point me to the same ?

Not all architecture use cacheinfo yet. How will the mm changes affect those
platforms ?

--
Regards,
Sudeep

[1] https://lore.kernel.org/all/20230920061856.257597-1-ying.huang@xxxxxxxxx/