Re: [patch V3 23/40] x86/cpu: Provide cpu_init/parse_topology()

[Thomas Gleixner]

On Sat, Aug 12 2023 at 08:00, Rui Zhang wrote:
> On Sat, 2023-08-12 at 14:38 +0800, Zhang Rui wrote:
> BTW, can we consider using system wide unique core_id instead?
>
> There are a couple of advantages by using this.
> CC Len, who can provide detailed justifications for this.

I have no problem with that. But as I said before we need a discussion
about the ID representation in general so it becomes a consistent view
at all levels.

The other thing to think about is whether we really need all these IDs
explicitly stored in cpu_info::topo... The vast majority of usage sites
is in some slow path (setup, cpu hotplug, proc, sysfs ...).

Thanks,

        tglx