linux-kernel - [tip: sched/core] x86/sched: Enable cluster scheduling on Hybrid

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Message-ID: <168959857149.28540.1815236085673081260.tip-bot2@tip-bot2>
Date:   Mon, 17 Jul 2023 12:56:11 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] x86/sched: Enable cluster scheduling on Hybrid

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     17953249bf02448efaed75b097aa2e9086ca7685
Gitweb:        https://git.kernel.org/tip/17953249bf02448efaed75b097aa2e9086ca7685
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Sat, 08 Jul 2023 14:43:45 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 13 Jul 2023 15:21:53 +02:00

x86/sched: Enable cluster scheduling on Hybrid

With the SMT vs non-SMT balancing issues sorted, also enable the
cluster domain for Hybrid machines.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/x86/kernel/smpboot.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index e1aa2cd..4c31447 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -632,14 +632,9 @@ static void __init build_sched_topology(void)
 	};
 #endif
 #ifdef CONFIG_SCHED_CLUSTER
-	/*
-	 * For now, skip the cluster domain on Hybrid.
-	 */
-	if (!cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)) {
-		x86_topology[i++] = (struct sched_domain_topology_level){
-			cpu_clustergroup_mask, x86_cluster_flags, SD_INIT_NAME(CLS)
-		};
-	}
+	x86_topology[i++] = (struct sched_domain_topology_level){
+		cpu_clustergroup_mask, x86_cluster_flags, SD_INIT_NAME(CLS)
+	};
 #endif
 #ifdef CONFIG_SCHED_MC
 	x86_topology[i++] = (struct sched_domain_topology_level){