Commit 871e35bc authored Jan 20, 2010 by Gautham R Shenoy Committed by Ingo Molnar Jan 21, 2010

sched: Fix the place where group powers are updated



We want to update the sched_group_powers when balance_cpu == this_cpu.

Currently the group powers are updated only if the balance_cpu is the
first CPU in the local group. But balance_cpu = this_cpu could also be
the first idle cpu in the group. Hence fix the place where the group
powers are updated.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1264017764.5717.127.camel@jschopp-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 8f190fb3

kernel/sched_fair.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -2418,11 +2418,8 @@ static inline void update_sg_lb_stats(struct sched_domain *sd,
		unsigned long sum_avg_load_per_task;
		unsigned long avg_load_per_task;

		if (local_group) {
		if (local_group)
		balance_cpu = group_first_cpu(group);
		if (balance_cpu == this_cpu)
		update_group_power(sd, this_cpu);
		}

		/* Tally up the load of all CPUs in the group */
		sum_avg_load_per_task = avg_load_per_task = 0;
		@@ -2470,6 +2467,8 @@ static inline void update_sg_lb_stats(struct sched_domain *sd,
		return;
		}

		update_group_power(sd, this_cpu);

		/* Adjust by relative CPU power of the group */
		sgs->avg_load = (sgs->group_load * SCHED_LOAD_SCALE) / group->cpu_power;