linux-kernel - Re: [PATCH v8 1/2] sched: Add per_cpu cluster domain info and cpus_share_lowest

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Date:   Tue, 30 May 2023 13:38:20 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Yicong Yang <yangyicong@...wei.com>
Cc:     mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        tim.c.chen@...ux.intel.com, yu.c.chen@...el.com,
        gautham.shenoy@....com, mgorman@...e.de, vschneid@...hat.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        prime.zeng@...wei.com, yangyicong@...ilicon.com,
        jonathan.cameron@...wei.com, ego@...ux.vnet.ibm.com,
        srikar@...ux.vnet.ibm.com, linuxarm@...wei.com, 21cnbao@...il.com,
        kprateek.nayak@....com, wuyun.abel@...edance.com,
        Barry Song <song.bao.hua@...ilicon.com>
Subject: Re: [PATCH v8 1/2] sched: Add per_cpu cluster domain info and
 cpus_share_lowest_cache API

On Tue, May 30, 2023 at 03:02:52PM +0800, Yicong Yang wrote:
> From: Barry Song <song.bao.hua@...ilicon.com>
> 
> Add per-cpu cluster domain info and cpus_share_lowest_cache() API.

Lowest cache is weird; that would be L1, but your implementation is for
L2/L3.