linux-kernel - [RFC 3/6] sched: s390: create a dedicated topology table

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Message-Id: <1394003906-11630-4-git-send-email-vincent.guittot@linaro.org>
Date:	Wed,  5 Mar 2014 15:18:23 +0800
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	peterz@...radead.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org, tony.luck@...el.com,
	fenghua.yu@...el.com, schwidefsky@...ibm.com,
	james.hogan@...tec.com, cmetcalf@...era.com,
	benh@...nel.crashing.org, linux@....linux.org.uk,
	linux-arm-kernel@...ts.infradead.org
Cc:	dietmar.eggemann@....com, preeti@...ux.vnet.ibm.com,
	linaro-kernel@...ts.linaro.org,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: [RFC 3/6] sched: s390: create a dedicated topology table

BOOK level is only relevant for s390 so we create a dedicated topology table
with BOOK level and remove it from default table.

Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
---
 arch/s390/include/asm/topology.h |   11 +----------
 arch/s390/kernel/topology.c      |   25 +++++++++++++++++++++++++
 kernel/sched/core.c              |    3 ---
 3 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index 07763bd..56af530 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -26,21 +26,12 @@ extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
 
 #define mc_capable() 1
 
-static inline const struct cpumask *cpu_coregroup_mask(int cpu)
-{
-	return &cpu_topology[cpu].core_mask;
-}
-
-static inline const struct cpumask *cpu_book_mask(int cpu)
-{
-	return &cpu_topology[cpu].book_mask;
-}
-
 int topology_cpu_init(struct cpu *);
 int topology_set_cpu_management(int fc);
 void topology_schedule_update(void);
 void store_topology(struct sysinfo_15_1_x *info);
 void topology_expect_change(void);
+const struct cpumask *cpu_coregroup_mask(int cpu);
 
 #else /* CONFIG_SCHED_BOOK */
 
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 4b2e3e3..8a7ac47 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -443,6 +443,28 @@ int topology_cpu_init(struct cpu *cpu)
 	return sysfs_create_group(&cpu->dev.kobj, &topology_cpu_attr_group);
 }
 
+const struct cpumask *cpu_coregroup_mask(int cpu)
+{
+	return &cpu_topology[cpu].core_mask;
+}
+
+static const struct cpumask *cpu_book_mask(int cpu)
+{
+	return &cpu_topology[cpu].book_mask;
+}
+
+static struct sched_domain_topology_level s390_topology[] = {
+	{ cpu_coregroup_mask, SD_SHARE_PKG_RESOURCES, SD_INIT_NAME(MC) },
+	{ cpu_book_mask, SD_INIT_NAME(BOOK) },
+	{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
+	{ NULL, },
+};
+
+static void __init set_sched_topology(void)
+{
+	sched_domain_topology = s390_topology;
+}
+
 static int __init topology_init(void)
 {
 	if (!MACHINE_HAS_TOPOLOGY) {
@@ -452,6 +474,9 @@ static int __init topology_init(void)
 	set_topology_timer();
 out:
 	update_cpu_masks();
+
+	set_sched_topology();
+
 	return device_create_file(cpu_subsys.dev_root, &dev_attr_dispatching);
 }
 device_initcall(topology_init);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 6f6a8f0..3479467 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6043,9 +6043,6 @@ static struct sched_domain_topology_level default_topology[] = {
 #ifdef CONFIG_SCHED_MC
 	{ cpu_coregroup_mask, SD_SHARE_PKG_RESOURCES, SD_INIT_NAME(MC) },
 #endif
-#ifdef CONFIG_SCHED_BOOK
-	{ cpu_book_mask, SD_INIT_NAME(BOOK) },
-#endif
 	{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
 	{ NULL, },
 };
-- 
1.7.9.5

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