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authorLauro Ramos Venancio <lvenanci@redhat.com>2017-04-20 22:51:40 +0300
committerIngo Molnar <mingo@kernel.org>2017-05-15 11:15:26 +0300
commitf32d782e31bf079f600dcec126ed117b0577e85c (patch)
tree8b49791b14fc6d308f2994426096934f354c511e /kernel/sched
parenta420b0630362c2c451060e6187e36d72df827134 (diff)
downloadlinux-f32d782e31bf079f600dcec126ed117b0577e85c.tar.xz
sched/topology: Optimize build_group_mask()
The group mask is always used in intersection with the group CPUs. So, when building the group mask, we don't have to care about CPUs that are not part of the group. Signed-off-by: Lauro Ramos Venancio <lvenanci@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: lwang@redhat.com Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1492717903-5195-2-git-send-email-lvenanci@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/topology.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 81c82031ed95..5a4d9aeda258 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -506,12 +506,12 @@ enum s_alloc {
*/
static void build_group_mask(struct sched_domain *sd, struct sched_group *sg)
{
- const struct cpumask *span = sched_domain_span(sd);
+ const struct cpumask *sg_span = sched_group_cpus(sg);
struct sd_data *sdd = sd->private;
struct sched_domain *sibling;
int i;
- for_each_cpu(i, span) {
+ for_each_cpu(i, sg_span) {
sibling = *per_cpu_ptr(sdd->sd, i);
if (!cpumask_test_cpu(i, sched_domain_span(sibling)))
continue;