2 files changed, 8 insertions, 3 deletions

diff --git a/kernel/sched/cpudeadline.c b/kernel/sched/cpudeadline.c
index bd95963dae80..539ca3ce071b 100644
--- a/kernel/sched/cpudeadline.c
+++ b/kernel/sched/cpudeadline.c
@@ -107,9 +107,7 @@ int cpudl_find(struct cpudl *cp, struct task_struct *p,
         int best_cpu = -1;
         const struct sched_dl_entity *dl_se = &p->dl;
 
-        if (later_mask && cpumask_and(later_mask, cp->free_cpus,
-                        &p->cpus_allowed) && cpumask_and(later_mask,
-                        later_mask, cpu_active_mask)) {
+        if (later_mask && cpumask_and(later_mask, later_mask, cp->free_cpus)) {
                 best_cpu = cpumask_any(later_mask);
                 goto out;
         } else if (cpumask_test_cpu(cpudl_maximum(cp), &p->cpus_allowed) &&
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index efb94124420d..abfaf3d9a29f 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1164,6 +1164,13 @@ static int find_later_rq(struct task_struct *task)
         if (task->nr_cpus_allowed == 1)
                 return -1;
 
+        /*
+         * We have to consider system topology and task affinity
+         * first, then we can look for a suitable cpu.
+         */
+        cpumask_copy(later_mask, task_rq(task)->rd->span);
+        cpumask_and(later_mask, later_mask, cpu_active_mask);
+        cpumask_and(later_mask, later_mask, &task->cpus_allowed);
         best_cpu = cpudl_find(&task_rq(task)->rd->cpudl,
                         task, later_mask);
         if (best_cpu == -1)