evie/android_kernel_oneplus_msm8998
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sched: don't select an inactive/isolated CPU in sbc()

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In select_best_cpu(), if no CPU is selected from the candidate
cluster, the search is expanded to the backup cluster. The
current code may select an inactive/isolated CPU in the
backup cluster. Fix this.

Change-Id: Id1e8a2b2f84ea274cdeda408957490ca05ef5fdb
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti 2017-02-09 14:23:39 +05:30
parent 2aa89ab3ff
commit 8485666f1c
1 changed files with 8 additions and 1 deletions
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9
kernel/sched/fair.c
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@ -2834,11 +2834,18 @@ struct cpu_select_env *env, struct cluster_cpu_stats *stats)
{
struct sched_cluster *next = NULL;
int i;
struct cpumask search_cpus;
while (!bitmap_empty(env->backup_list, num_clusters)) {
next = next_candidate(env->backup_list, 0, num_clusters);
__clear_bit(next->id, env->backup_list);
for_each_cpu_and(i, &env->p->cpus_allowed, &next->cpus) {
cpumask_and(&search_cpus, tsk_cpus_allowed(env->p),
&next->cpus);
cpumask_and(&search_cpus, &search_cpus, cpu_active_mask);
cpumask_andnot(&search_cpus, &search_cpus, cpu_isolated_mask);
for_each_cpu(i, &search_cpus) {
trace_sched_cpu_load_wakeup(cpu_rq(i), idle_cpu(i),
sched_irqload(i), power_cost(i, task_load(env->p) +
cpu_cravg_sync(i, env->sync)), 0);