linux-kernel - Re: [PATCH RESEND 1/3] topology: Represent clusters of CPUs within a die

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Date:   Wed, 6 Oct 2021 14:18:58 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Barry Song <21cnbao@...il.com>
Cc:     Valentin Schneider <valentin.schneider@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Aubrey Li <aubrey.li@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Ben Segall <bsegall@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guodong Xu <guodong.xu@...aro.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        "Cc: Len Brown" <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        Linuxarm <linuxarm@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Mel Gorman <mgorman@...e.de>, msys.mizuma@...il.com,
        "Zengtao (B)" <prime.zeng@...ilicon.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Steven Rostedt <rostedt@...dmis.org>,
        Barry Song <song.bao.hua@...ilicon.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Will Deacon <will@...nel.org>, x86 <x86@...nel.org>,
        yangyicong <yangyicong@...wei.com>,
        Tian Tao <tiantao6@...ilicon.com>
Subject: Re: [PATCH RESEND 1/3] topology: Represent clusters of CPUs within a
 die

On Wed, Oct 06, 2021 at 11:50:35PM +1300, Barry Song wrote:

> > diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> > index 7cb31d959f33..fc0836f460fb 100644
> > --- a/drivers/base/arch_topology.c
> > +++ b/drivers/base/arch_topology.c
> > @@ -622,7 +622,8 @@ void update_siblings_masks(unsigned int cpuid)
> >                 if (cpuid_topo->package_id != cpu_topo->package_id)
> >                         continue;
> >
> > -               if (cpuid_topo->cluster_id == cpu_topo->cluster_id) {
> > +               if (cpuid_topo->cluster_id == cpu_topo->cluster_id &&
> > +                   cpuid_topo->cluster_id != -1) {
> >                         cpumask_set_cpu(cpu, &cpuid_topo->cluster_sibling);
> >                         cpumask_set_cpu(cpuid, &cpu_topo->cluster_sibling);
> >                 }
> >
> 
> Hi Peter,
> Would you like to change this line in your tree?

Can you please double check:

  https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/log/?h=sched/next