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Date:   Mon, 18 Jul 2022 15:47:01 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Tariq Toukan <tariqt@nvidia.com>
Cc:     "David S. Miller" <davem@davemloft.net>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org,
        Gal Pressman <gal@nvidia.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next V2 1/2] sched/topology: Expose
 sched_numa_find_closest
Message-ID: <YtVkVQvbh9K93WJg@worktop.programming.kicks-ass.net>
References: <20220718124315.16648-1-tariqt@nvidia.com>
 <20220718124315.16648-2-tariqt@nvidia.com>
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On Mon, Jul 18, 2022 at 03:43:14PM +0300, Tariq Toukan wrote:
> This logic can help device drivers prefer some remote cpus
> over others, according to the NUMA distance metrics.
> 
> Reviewed-by: Gal Pressman <gal@nvidia.com>
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

> ---
>  include/linux/sched/topology.h | 2 ++
>  kernel/sched/topology.c        | 1 +
>  2 files changed, 3 insertions(+)
> 
> v2:
> Replaced EXPORT_SYMBOL with EXPORT_SYMBOL_GPL, per Peter's comment.
> 
> diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h
> index 56cffe42abbc..d467c30bdbb9 100644
> --- a/include/linux/sched/topology.h
> +++ b/include/linux/sched/topology.h
> @@ -61,6 +61,8 @@ static inline int cpu_numa_flags(void)
>  {
>  	return SD_NUMA;
>  }
> +
> +int sched_numa_find_closest(const struct cpumask *cpus, int cpu);
>  #endif
>  
>  extern int arch_asym_cpu_priority(int cpu);
> diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
> index 05b6c2ad90b9..274fb2bd3849 100644
> --- a/kernel/sched/topology.c
> +++ b/kernel/sched/topology.c
> @@ -2066,6 +2066,7 @@ int sched_numa_find_closest(const struct cpumask *cpus, int cpu)
>  
>  	return found;
>  }
> +EXPORT_SYMBOL_GPL(sched_numa_find_closest);
>  
>  #endif /* CONFIG_NUMA */
>  
> -- 
> 2.21.0
>