From: Tariq Toukan <tariqt@nvidia.com>
To: "David S. Miller" <davem@davemloft.net>,
Saeed Mahameed <saeedm@nvidia.com>,
Jakub Kicinski <kuba@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>
Cc: 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>, Tariq Toukan <tariqt@nvidia.com>
Subject: [PATCH net-next V2 1/2] sched/topology: Expose sched_numa_find_closest
Date: Mon, 18 Jul 2022 15:43:14 +0300 [thread overview]
Message-ID: <20220718124315.16648-2-tariqt@nvidia.com> (raw)
In-Reply-To: <20220718124315.16648-1-tariqt@nvidia.com>
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>
---
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
next prev parent reply other threads:[~2022-07-18 12:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-18 12:43 [PATCH net-next V2 0/2] mlx5: Use NUMA distance metrics Tariq Toukan
2022-07-18 12:43 ` Tariq Toukan [this message]
2022-07-18 13:47 ` [PATCH net-next V2 1/2] sched/topology: Expose sched_numa_find_closest Peter Zijlstra
2022-07-18 12:43 ` [PATCH net-next V2 2/2] net/mlx5e: Improve remote NUMA preferences used for the IRQ affinity hints Tariq Toukan
2022-07-18 13:50 ` Peter Zijlstra
2022-07-18 19:49 ` Tariq Toukan
2022-07-18 21:24 ` Peter Zijlstra
2022-07-18 21:57 ` Jakub Kicinski
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