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authorSrivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>2008-06-27 13:41:20 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-27 14:31:33 +0200
commit53fecd8ae1900fb571086f54f664051004665b55 (patch)
tree2dfd5aba9d974f0f114e96cbdc2aef82a32078a9 /kernel/sched_fair.c
parent4d8d595dfa69e1c807bf928f364668a7f30da5dc (diff)
downloadop-kernel-dev-53fecd8ae1900fb571086f54f664051004665b55.zip
op-kernel-dev-53fecd8ae1900fb571086f54f664051004665b55.tar.gz
sched: kill task_group balancing
The idea was to balance groups until we've reached the global goal, however Vatsa rightly pointed out that we might never reach that goal this way - hence take out this logic. [ the initial rationale for this 'feature' was to promote max concurrency within a group - it does not however affect fairness ] Reported-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Cc: Mike Galbraith <efault@gmx.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
-rw-r--r--kernel/sched_fair.c15
1 files changed, 2 insertions, 13 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 40cf24a..b10c0d6 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1422,9 +1422,7 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
rcu_read_lock();
list_for_each_entry(tg, &task_groups, list) {
- long imbalance;
- unsigned long this_weight, busiest_weight;
- long rem_load, max_load, moved_load;
+ long rem_load, moved_load;
/*
* empty group
@@ -1435,17 +1433,8 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
rem_load = rem_load_move * aggregate(tg, this_cpu)->rq_weight;
rem_load /= aggregate(tg, this_cpu)->load + 1;
- this_weight = tg->cfs_rq[this_cpu]->task_weight;
- busiest_weight = tg->cfs_rq[busiest_cpu]->task_weight;
-
- imbalance = (busiest_weight - this_weight) / 2;
-
- if (imbalance < 0)
- imbalance = busiest_weight;
-
- max_load = max(rem_load, imbalance);
moved_load = __load_balance_fair(this_rq, this_cpu, busiest,
- max_load, sd, idle, all_pinned, this_best_prio,
+ rem_load, sd, idle, all_pinned, this_best_prio,
tg->cfs_rq[busiest_cpu]);
if (!moved_load)
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