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Date: Mon, 20 Jan 2014 12:39:44 +0000
From: dietmar.eggemann@....com
To: peterz@...radead.org, mingo@...hat.com, vincent.guittot@...aro.org,
morten.rasmussen@....com, chris.redpath@....com
Cc: linux-kernel@...r.kernel.org, dietmar.eggemann@....com
Subject: [RFC v2 PATCH 07/11] sched: consolidate sched_init_numa() and sched_init_conv()
From: Dietmar Eggemann <dietmar.eggemann@....com>
Consolidate sched_init_numa() and sched_init_conv() into one function
sched_init_topology().
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
---
kernel/sched/core.c | 164 +++++++++++++++++++++------------------------------
1 file changed, 68 insertions(+), 96 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 798a4d2c9d7b..9edd1d511f3c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5410,13 +5410,72 @@ static bool find_numa_distance(int distance)
return false;
}
-static void sched_init_numa(void)
+static void sched_domains_numa_masks_set(int cpu)
+{
+ int i, j;
+ int node = cpu_to_node(cpu);
+
+ for (i = 0; i < sched_domains_numa_levels; i++) {
+ for (j = 0; j < nr_node_ids; j++) {
+ if (node_distance(j, node) <= sched_domains_numa_distance[i])
+ cpumask_set_cpu(cpu, sched_domains_numa_masks[i][j]);
+ }
+ }
+}
+
+static void sched_domains_numa_masks_clear(int cpu)
+{
+ int i, j;
+ for (i = 0; i < sched_domains_numa_levels; i++) {
+ for (j = 0; j < nr_node_ids; j++)
+ cpumask_clear_cpu(cpu, sched_domains_numa_masks[i][j]);
+ }
+}
+
+/*
+ * Update sched_domains_numa_masks[level][node] array when new cpus
+ * are onlined.
+ */
+static int sched_domains_numa_masks_update(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ int cpu = (long)hcpu;
+
+ switch (action & ~CPU_TASKS_FROZEN) {
+ case CPU_ONLINE:
+ sched_domains_numa_masks_set(cpu);
+ break;
+
+ case CPU_DEAD:
+ sched_domains_numa_masks_clear(cpu);
+ break;
+
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+#else
+static int sched_domains_numa_masks_update(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ return 0;
+}
+#endif /* CONFIG_NUMA */
+
+static void sched_init_topology(void)
{
- int next_distance, curr_distance = node_distance(0, 0);
struct sched_domain_topology_level *tl;
struct sched_domain_topology_info *ti = sched_domain_topology_info;
int level = 0;
- int i, j, k;
+ int i;
+
+#ifdef CONFIG_NUMA
+ int next_distance, curr_distance = node_distance(0, 0);
+ int j, k;
sched_domains_numa_distance = kzalloc(sizeof(int) * nr_node_ids, GFP_KERNEL);
if (!sched_domains_numa_distance)
@@ -5512,6 +5571,7 @@ static void sched_init_numa(void)
}
}
}
+#endif /* CONFIG_NUMA */
/*
* An extra empty struct sched_domain_topology_level element at the end
@@ -5529,6 +5589,9 @@ static void sched_init_numa(void)
for (i = 0; i < sched_domain_topology_info_size; i++)
tl[i].info = ti[i];
+ sched_domain_topology = tl;
+
+#ifdef CONFIG_NUMA
/*
* .. and append 'j' levels of NUMA goodness.
*/
@@ -5541,99 +5604,9 @@ static void sched_init_numa(void)
};
}
- sched_domain_topology = tl;
-
sched_domains_numa_levels = level;
-}
-
-static void sched_init_conv(void)
-{
-}
-
-static void sched_domains_numa_masks_set(int cpu)
-{
- int i, j;
- int node = cpu_to_node(cpu);
-
- for (i = 0; i < sched_domains_numa_levels; i++) {
- for (j = 0; j < nr_node_ids; j++) {
- if (node_distance(j, node) <= sched_domains_numa_distance[i])
- cpumask_set_cpu(cpu, sched_domains_numa_masks[i][j]);
- }
- }
-}
-
-static void sched_domains_numa_masks_clear(int cpu)
-{
- int i, j;
- for (i = 0; i < sched_domains_numa_levels; i++) {
- for (j = 0; j < nr_node_ids; j++)
- cpumask_clear_cpu(cpu, sched_domains_numa_masks[i][j]);
- }
-}
-
-/*
- * Update sched_domains_numa_masks[level][node] array when new cpus
- * are onlined.
- */
-static int sched_domains_numa_masks_update(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- sched_domains_numa_masks_set(cpu);
- break;
-
- case CPU_DEAD:
- sched_domains_numa_masks_clear(cpu);
- break;
-
- default:
- return NOTIFY_DONE;
- }
-
- return NOTIFY_OK;
-}
-#else
-static inline void sched_init_numa(void)
-{
-}
-
-static void sched_init_conv(void)
-{
- struct sched_domain_topology_level *tl;
- struct sched_domain_topology_info *ti = sched_domain_topology_info;
- int i;
-
- /*
- * An extra empty struct sched_domain_topology_level element at the end
- * of the array is needed to let for_each_sd_topology() work correctly.
- */
- tl = kzalloc((sched_domain_topology_info_size + 1) *
- sizeof(struct sched_domain_topology_level),
- GFP_KERNEL);
- if (!tl)
- return;
-
- /*
- * Copy the topology info bits..
- */
- for (i = 0; i < sched_domain_topology_info_size; i++)
- tl[i].info = ti[i];
-
- sched_domain_topology = tl;
-}
-
-static int sched_domains_numa_masks_update(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- return 0;
-}
#endif /* CONFIG_NUMA */
+}
static struct sched_domain *
sd_init(struct sched_domain_topology_level *tl, int cpu)
@@ -6151,8 +6124,7 @@ void __init sched_init_smp(void)
alloc_cpumask_var(&non_isolated_cpus, GFP_KERNEL);
alloc_cpumask_var(&fallback_doms, GFP_KERNEL);
- sched_init_conv();
- sched_init_numa();
+ sched_init_topology();
/*
* There's no userspace yet to cause hotplug operations; hence all the
--
1.7.9.5
--
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