Re: [PATCH v3 2/2] x86/AMD: Group cpu_llc_id assignment by topology feature and family

From: Ingo Molnar
Date: Mon Nov 07 2016 - 02:29:14 EST

* Borislav Petkov <bp@xxxxxxx> wrote:

> Ditto, clean it up and add tags:
> ---
> From: Yazen Ghannam <Yazen.Ghannam@xxxxxxx>
> Date: Tue, 1 Nov 2016 11:51:03 -0500
> Subject: [PATCH] x86/AMD: Group cpu_llc_id assignment
> Currently, we assume that a system has multiple last level caches only
> if there are multiple nodes, and that the cpu_llc_id is equal to the
> node_id. This no longer applies since Fam17h can have multiple last
> level caches within a node.

Wondering what the practical effect of this is - is any current hardware affected,
and if yes, what are the effects of this patch?