linux-kernel - Re: [PATCH v2 1/8] arch_topology: Don't set cluster identifier as physical package identifier

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Message-ID: <d4c7fd09-814a-e57a-fe8f-a3959472991b@arm.com>
Date:   Fri, 20 May 2022 14:31:24 +0200
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Sudeep Holla <sudeep.holla@....com>,
        Atish Patra <atishp@...shpatra.org>,
        linux-kernel@...r.kernel.org
Cc:     Atish Patra <atishp@...osinc.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Qing Wang <wangqing@...o.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v2 1/8] arch_topology: Don't set cluster identifier as
 physical package identifier

On 18/05/2022 11:33, Sudeep Holla wrote:

You say `cluster identifier` which to me refers to
`cpu_topology[cpu].cluster_id`. But I guess you meant `cluster node`
from cpu-map DT node?

Otherwise you say we link (1.level) cpu-map cluster nodes to
`cluster_id\_sibling`? But then (1) we will never support nested
clusters and (2) why would we need llc support then?

[...]