From: Alex Shi alex.shi@intel.com
Packing tasks among such domain can't save power, just performance losing. So no power balance on them.
Signed-off-by: Alex Shi alex.shi@intel.com [Added CONFIG_SCHED_POWER switch to enable this patch] Signed-off-by: Preeti U Murthy preeti@linux.vnet.ibm.com ---
kernel/sched/fair.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c49ee6c..adda9cf 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4744,7 +4744,7 @@ static int get_cpu_for_power_policy(struct sched_domain *sd, int cpu,
policy = get_sd_sched_balance_policy(sd, cpu, p, sds); if (policy != SCHED_POLICY_PERFORMANCE && sds->group_leader) { - if (wakeup) + if (wakeup && !(sd->flags & SD_SHARE_CPUCAPACITY)) new_cpu = find_leader_cpu(sds->group_leader, p, cpu, policy); /* for fork balancing and a little busy task */ @@ -5882,8 +5882,9 @@ static inline void init_sd_lb_stats(struct sd_lb_stats *sds) static inline void init_sd_lb_power_stats(struct lb_env *env, struct sd_lb_stats *sds) { - if (sched_balance_policy == SCHED_POLICY_PERFORMANCE || - env->idle == CPU_NOT_IDLE) { + if (sched_balance_policy == SCHED_POLICY_PERFORMANCE + || env->sd->flags & SD_SHARE_CPUCAPACITY + || env->idle == CPU_NOT_IDLE) { env->flags &= ~LBF_POWER_BAL; env->flags |= LBF_PERF_BAL; return;