sched/fair: Move call to list_last_entry() in detach_tasks

Move the call to list_last_entry() in detach_tasks() after testing
loop_max and loop_break.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220825122726.20819-4-vincent.guittot@linaro.org

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 7b3a58fcb4368ffc42fede52d4d04812c851b10c..5ffec43706023615686c11340177503d9710c0c1 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8044,8 +8044,6 @@ static int detach_tasks(struct lb_env *env)
                if (env->idle != CPU_NOT_IDLE && env->src_rq->nr_running <= 1)
                        break;
 
-               p = list_last_entry(tasks, struct task_struct, se.group_node);
-
                env->loop++;
                /*
                 * We've more or less seen every task there is, call it quits
@@ -8062,6 +8060,8 @@ static int detach_tasks(struct lb_env *env)
                        break;
                }
 
+               p = list_last_entry(tasks, struct task_struct, se.group_node);
+
                if (!can_migrate_task(p, env))
                        goto next;