diff options
| author |   Vincent Guittot <vincent.guittot@linaro.org> | 2021-10-19 14:35:36 +0200 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2021-10-31 11:11:38 +0100 |
| commit | c5b0a7eefc70150caf23e37bc9d639c68c87a097 (patch) | |
| tree | dbfc572f5aa990e87c9d131fa8c45a54ce60b74c /kernel/sched/fair.c | |
| parent | sched/fair: Wait before decaying max_newidle_lb_cost (diff) | |
| download | linux-dev-c5b0a7eefc70150caf23e37bc9d639c68c87a097.tar.xz linux-dev-c5b0a7eefc70150caf23e37bc9d639c68c87a097.zip | |
sched/fair: Remove sysctl_sched_migration_cost condition
With a default value of 500us, sysctl_sched_migration_cost is
significanlty higher than the cost of load_balance. Remove the
condition and rely on the sd->max_newidle_lb_cost to abort
newidle_balance.
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Link: https://lore.kernel.org/r/20211019123537.17146-5-vincent.guittot@linaro.org
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e50fd751e1df..57eae0ebc492 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -10895,8 +10895,7 @@ static int newidle_balance(struct rq *this_rq, struct rq_flags *rf) rcu_read_lock(); sd = rcu_dereference_check_sched_domain(this_rq->sd); - if (this_rq->avg_idle < sysctl_sched_migration_cost || - !READ_ONCE(this_rq->rd->overload) || + if (!READ_ONCE(this_rq->rd->overload) || (sd && this_rq->avg_idle < sd->max_newidle_lb_cost)) { if (sd) |