Re: [PATCH 2/8] sched/topology: introduce sched_numa_find_next_cpu()

Andy Shevchenko
2023-03-27T10:29:18Z

On Sat, Mar 25, 2023 at 11:55:08AM -0700, Yury Norov wrote:
> The function searches for the next CPU in a given cpumask according to
> NUMA topology, so that it traverses cpus per-hop.
>
> If the CPU is the last cpu in a given hop, sched_numa_find_next_cpu()
> switches to the next hop, and picks the first CPU from there, excluding
> those already traversed.

...

> +/*

Hmm... Is it deliberately not a kernel doc?

> + * sched_numa_find_next_cpu() - given the NUMA topology, find the next cpu
> + * cpumask: cpumask to find a cpu from
> + * cpu: current cpu
> + * node: local node
> + * hop: (in/out) indicates distance order of current CPU to a local node
> + *
> + * The function searches for next cpu at a given NUMA distance, indicated
> + * by hop, and if nothing found, tries to find CPUs at a greater distance,
> + * starting from the beginning.
> + *
> + * returns: cpu, or >= nr_cpu_ids when nothing found.
> + */

--
With Best Regards,
Andy Shevchenko