sched, cpuset: customize sched domains, core

[rebased for sched-devel/latest]

 - Add a new cpuset file, having levels:
     sched_relax_domain_level

 - Modify partition_sched_domains() and build_sched_domains()
   to take attributes parameter passed from cpuset.

 - Fill newidle_idx for node domains which currently unused but
   might be required if sched_relax_domain_level become higher.

 - We can change the default level by boot option 'relax_domain_level='.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index de4250c53a19..b43748efaa7f 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -940,7 +940,9 @@ static int wake_idle(int cpu, struct task_struct *p)
                 return cpu;
 
         for_each_domain(cpu, sd) {
-                if (sd->flags & SD_WAKE_IDLE) {
+                if ((sd->flags & SD_WAKE_IDLE)
+                    || ((sd->flags & SD_WAKE_IDLE_FAR)
+                        && !task_hot(p, task_rq(p)->clock, sd))) {
                         cpus_and(tmp, sd->span, p->cpus_allowed);
                         for_each_cpu_mask(i, tmp) {
                                 if (idle_cpu(i)) {