linux-kernel - Re: [PATCH v3 09/16] arch_topology: Drop LLC identifier stash from the CPU topology

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Date:   Wed, 1 Jun 2022 11:35:20 +0800
From:   Gavin Shan <gshan@...hat.com>
To:     Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org
Cc:     Atish Patra <atishp@...shpatra.org>,
        Atish Patra <atishp@...osinc.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Dietmar Eggemann <dietmar.eggemann@....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 v3 09/16] arch_topology: Drop LLC identifier stash from
 the CPU topology

Hi Sudeep,

On 5/25/22 4:14 PM, Sudeep Holla wrote:
> Since the cacheinfo LLC information is used directly in arch_topology,
> there is no need to parse and store the LLC ID information only for
> ACPI systems in the CPU topology.
> 
> Remove the redundant LLC ID from the generic CPU arch_topology information.
> 
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> ---
>   drivers/base/arch_topology.c  | 1 -
>   include/linux/arch_topology.h | 1 -
>   2 files changed, 2 deletions(-)
> 

How about merge the changes to PATCH[08/16]? I don't see why we need put
the changes into separate patches.

> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> index 4c486e4e6f2f..76c702c217c5 100644
> --- a/drivers/base/arch_topology.c
> +++ b/drivers/base/arch_topology.c
> @@ -747,7 +747,6 @@ void __init reset_cpu_topology(void)
>   		cpu_topo->core_id = -1;
>   		cpu_topo->cluster_id = -1;
>   		cpu_topo->package_id = -1;
> -		cpu_topo->llc_id = -1;
>   
>   		clear_cpu_topology(cpu);
>   	}
> diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
> index 58cbe18d825c..a07b510e7dc5 100644
> --- a/include/linux/arch_topology.h
> +++ b/include/linux/arch_topology.h
> @@ -68,7 +68,6 @@ struct cpu_topology {
>   	int core_id;
>   	int cluster_id;
>   	int package_id;
> -	int llc_id;
>   	cpumask_t thread_sibling;
>   	cpumask_t core_sibling;
>   	cpumask_t cluster_sibling;
> 

Thanks,
Gavin