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HMP: Update migration timer when we fork-migrate

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Prevents fork-migration adversely interacting with normal
migration (i.e. runqueues containing forked tasks being
selected as migration targets when there is a better
choice available)

Signed-off-by: Chris Redpath <chris.redpath@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
This commit is contained in:
Chris Redpath
2013-07-23 14:56:45 +01:00
committed by Jon Medhurst
parent 0d520ee8d4
commit c2111520cf
1 changed files with 13 additions and 5 deletions
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18
kernel/sched/fair.c
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@@ -4079,18 +4079,26 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
if(hmp_cpu_is_fastest(prev_cpu)) {
struct hmp_domain *hmpdom = list_entry(&hmp_cpu_domain(prev_cpu)->hmp_domains, struct hmp_domain, hmp_domains);
__always_unused int lowest_ratio = hmp_domain_min_load(hmpdom, &new_cpu);
if(new_cpu != NR_CPUS && cpumask_test_cpu(new_cpu,tsk_cpus_allowed(p)))
if (new_cpu != NR_CPUS &&
cpumask_test_cpu(new_cpu,
tsk_cpus_allowed(p))) {
hmp_next_up_delay(&p->se, new_cpu);
return new_cpu;
else {
new_cpu = cpumask_any_and(&hmp_faster_domain(cpu)->cpus,
} else {
new_cpu = cpumask_any_and(
&hmp_faster_domain(cpu)->cpus,
tsk_cpus_allowed(p));
if(new_cpu < nr_cpu_ids)
if (new_cpu < nr_cpu_ids) {
hmp_next_up_delay(&p->se, new_cpu);
return new_cpu;
}
}
} else {
new_cpu = hmp_select_faster_cpu(p, prev_cpu);
if (new_cpu != NR_CPUS)
if (new_cpu != NR_CPUS) {
hmp_next_up_delay(&p->se, new_cpu);
return new_cpu;
}
}
}
#endif