diff options
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 978bf6f6e0ff..014d4f793313 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1650,7 +1650,12 @@ static int __set_cpus_allowed_ptr(struct task_struct *p, if (cpumask_equal(p->cpus_ptr, new_mask)) goto out; - dest_cpu = cpumask_any_and(cpu_valid_mask, new_mask); + /* + * Picking a ~random cpu helps in cases where we are changing affinity + * for groups of tasks (ie. cpuset), so that load balancing is not + * immediately required to distribute the tasks within their new mask. + */ + dest_cpu = cpumask_any_and_distribute(cpu_valid_mask, new_mask); if (dest_cpu >= nr_cpu_ids) { ret = -EINVAL; goto out; |