lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sched: Break out cpu_power from the sched_group structure

Browse Source 
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>
This commit is contained in:
Peter Zijlstra
2011-07-14 13:00:06 +02:00
committed by Ingo Molnar
parent e6625fa48e
commit 9c3f75cbd1
3 changed files with 58 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
kernel/sched.c
View File

@ -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);
}
}