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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-07-14 13:00:06 +0200
committerIngo Molnar <mingo@elte.hu>2011-07-20 18:32:40 +0200
commit9c3f75cbd144014bea6af866a154cc2e73ab2287 (patch)
tree2a565f7ff0820269973415c5605e313cfff903b4 /kernel/sched.c
parente6625fa48e6580a74b7e700efd7e6463e282810b (diff)
downloadblackbird-op-linux-9c3f75cbd144014bea6af866a154cc2e73ab2287.tar.gz
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sched: Break out cpu_power from the sched_group structure
In order to prepare for non-unique sched_groups per domain, we need to carry the cpu_power elsewhere, so put a level of indirection in. Reported-and-tested-by: Anton Blanchard <anton@samba.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-qkho2byuhe4482fuknss40ad@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 3dc716f6d8ad..36c10d25d4cd 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6557,7 +6557,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
break;
}
- if (!group->cpu_power) {
+ if (!group->sgp->power) {
printk(KERN_CONT "\n");
printk(KERN_ERR "ERROR: domain->cpu_power not "
"set\n");
@@ -6581,9 +6581,9 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
printk(KERN_CONT " %s", str);
- if (group->cpu_power != SCHED_POWER_SCALE) {
+ if (group->sgp->power != SCHED_POWER_SCALE) {
printk(KERN_CONT " (cpu_power = %d)",
- group->cpu_power);
+ group->sgp->power);
}
group = group->next;
@@ -6777,8 +6777,10 @@ static struct root_domain *alloc_rootdomain(void)
static void free_sched_domain(struct rcu_head *rcu)
{
struct sched_domain *sd = container_of(rcu, struct sched_domain, rcu);
- if (atomic_dec_and_test(&sd->groups->ref))
+ if (atomic_dec_and_test(&sd->groups->ref)) {
+ kfree(sd->groups->sgp);
kfree(sd->groups);
+ }
kfree(sd);
}
@@ -6945,6 +6947,7 @@ int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
struct sd_data {
struct sched_domain **__percpu sd;
struct sched_group **__percpu sg;
+ struct sched_group_power **__percpu sgp;
};
struct s_data {
@@ -6981,8 +6984,10 @@ static int get_group(int cpu, struct sd_data *sdd, struct sched_group **sg)
if (child)
cpu = cpumask_first(sched_domain_span(child));
- if (sg)
+ if (sg) {
*sg = *per_cpu_ptr(sdd->sg, cpu);
+ (*sg)->sgp = *per_cpu_ptr(sdd->sgp, cpu);
+ }
return cpu;
}
@@ -7020,7 +7025,7 @@ build_sched_groups(struct sched_domain *sd)
continue;
cpumask_clear(sched_group_cpus(sg));
- sg->cpu_power = 0;
+ sg->sgp->power = 0;
for_each_cpu(j, span) {
if (get_group(j, sdd, NULL) != group)
@@ -7185,6 +7190,7 @@ static void claim_allocations(int cpu, struct sched_domain *sd)
if (cpu == cpumask_first(sched_group_cpus(sg))) {
WARN_ON_ONCE(*per_cpu_ptr(sdd->sg, cpu) != sg);
*per_cpu_ptr(sdd->sg, cpu) = NULL;
+ *per_cpu_ptr(sdd->sgp, cpu) = NULL;
}
}
@@ -7234,9 +7240,14 @@ static int __sdt_alloc(const struct cpumask *cpu_map)
if (!sdd->sg)
return -ENOMEM;
+ sdd->sgp = alloc_percpu(struct sched_group_power *);
+ if (!sdd->sgp)
+ return -ENOMEM;
+
for_each_cpu(j, cpu_map) {
struct sched_domain *sd;
struct sched_group *sg;
+ struct sched_group_power *sgp;
sd = kzalloc_node(sizeof(struct sched_domain) + cpumask_size(),
GFP_KERNEL, cpu_to_node(j));
@@ -7251,6 +7262,13 @@ static int __sdt_alloc(const struct cpumask *cpu_map)
return -ENOMEM;
*per_cpu_ptr(sdd->sg, j) = sg;
+
+ sgp = kzalloc_node(sizeof(struct sched_group_power),
+ GFP_KERNEL, cpu_to_node(j));
+ if (!sgp)
+ return -ENOMEM;
+
+ *per_cpu_ptr(sdd->sgp, j) = sgp;
}
}
@@ -7268,9 +7286,11 @@ static void __sdt_free(const struct cpumask *cpu_map)
for_each_cpu(j, cpu_map) {
kfree(*per_cpu_ptr(sdd->sd, j));
kfree(*per_cpu_ptr(sdd->sg, j));
+ kfree(*per_cpu_ptr(sdd->sgp, j));
}
free_percpu(sdd->sd);
free_percpu(sdd->sg);
+ free_percpu(sdd->sgp);
}
}
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