linux-kernel - [PATCH 4/15] sched: Define per CPU variables and cpu_to

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Date:	Thu, 20 Aug 2009 15:35:39 +0200
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/15] sched: Define per CPU variables and cpu_to_group
	function for MN domain


Additionally fixup cpu_to_phys_group() in case of CONFIG_SCHED_MN=y.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com>
---
 kernel/sched.c |   32 +++++++++++++++++++++++++++-----
 1 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 9990c3a..d85985d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8255,9 +8255,27 @@ cpu_to_cpu_group(int cpu, const struct cpumask *cpu_map,
 #ifdef CONFIG_SCHED_MC
 static DEFINE_PER_CPU(struct static_sched_domain, core_domains);
 static DEFINE_PER_CPU(struct static_sched_group, sched_group_core);
-#endif /* CONFIG_SCHED_MC */
 
-#if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
+/*
+ * multi-node sched-domains:
+ */
+#ifdef CONFIG_SCHED_MN
+static DEFINE_PER_CPU(struct static_sched_domain, cpu_node_domains);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_cpu_node);
+
+static int cpu_to_cpu_node_group(int cpu, const struct cpumask *cpu_map,
+                                 struct sched_group **sg, struct cpumask *mask)
+{
+        int group;
+        cpumask_and(mask, cpu_coregroup_mask(cpu), cpu_map);
+        group = cpumask_first(mask);
+        if (sg)
+                *sg = &per_cpu(sched_group_cpu_node, group).sg;
+        return group;
+}
+#endif /* CONFIG_SCHED_MN */
+
+#ifdef CONFIG_SCHED_SMT
 static int
 cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
 		  struct sched_group **sg, struct cpumask *mask)
@@ -8270,7 +8288,7 @@ cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
 		*sg = &per_cpu(sched_group_core, group).sg;
 	return group;
 }
-#elif defined(CONFIG_SCHED_MC)
+#else
 static int
 cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
 		  struct sched_group **sg, struct cpumask *unused)
@@ -8279,7 +8297,8 @@ cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
 		*sg = &per_cpu(sched_group_core, cpu).sg;
 	return cpu;
 }
-#endif
+#endif /* CONFIG_SCHED_SMT */
+#endif /* CONFIG_SCHED_MC */
 
 static DEFINE_PER_CPU(struct static_sched_domain, phys_domains);
 static DEFINE_PER_CPU(struct static_sched_group, sched_group_phys);
@@ -8289,7 +8308,10 @@ cpu_to_phys_group(int cpu, const struct cpumask *cpu_map,
 		  struct sched_group **sg, struct cpumask *mask)
 {
 	int group;
-#ifdef CONFIG_SCHED_MC
+#ifdef CONFIG_SCHED_MN
+	cpumask_and(mask, topology_cpu_node_cpumask(cpu), cpu_map);
+	group = cpumask_first(mask);
+#elif CONFIG_SCHED_MC
 	cpumask_and(mask, cpu_coregroup_mask(cpu), cpu_map);
 	group = cpumask_first(mask);
 #elif defined(CONFIG_SCHED_SMT)
-- 
1.6.0.4



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