diff options
| author | Morten Rasmussen <morten.rasmussen@arm.com> | 2015-01-21 10:27:07 +0000 |
|---|---|---|
| committer | Juri Lelli <juri.lelli@arm.com> | 2015-03-03 16:43:00 +0000 |
| commit | c0949c8ec7a2f0ef288641b4cf3acd96563237f7 (patch) | |
| tree | 8bb24792dda1da87d95ded0c71ec70bfe9c8443d | |
| parent | 353fa945e172db51aee98304256432d723ffdcdf (diff) | |
sched: Enable active migration for cpus of lower capacity
Add an extra criteria to need_active_balance() to kick off active load
balance if the source cpu is overutilized and has lower capacity than
the destination cpus.
cc: Ingo Molnar <mingo@redhat.com>
cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
| -rw-r--r-- | kernel/sched/fair.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index bb2e7c798c0..3a8a8acc3b8 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6943,6 +6943,13 @@ static int need_active_balance(struct lb_env *env) return 1; } + if ((capacity_of(env->src_cpu) < capacity_of(env->dst_cpu)) && + env->src_rq->cfs.h_nr_running == 1 && + cpu_overutilized(env->src_cpu, env->sd) && + !cpu_overutilized(env->dst_cpu, env->sd)) { + return 1; + } + return unlikely(sd->nr_balance_failed > sd->cache_nice_tries+2); } |