sched/core: Fix double update_rq_clock) calls in attach_task()/detach_task()

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 72b081b..2805bd7 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6771,7 +6771,7 @@ static void detach_task(struct task_struct *p, struct lb_env *env)
        lockdep_assert_held(&env->src_rq->lock);
 
        p->on_rq = TASK_ON_RQ_MIGRATING;
-       deactivate_task(env->src_rq, p, 0);
+       deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK);
        set_task_cpu(p, env->dst_cpu);
 }
 
@@ -6904,7 +6904,7 @@ static void attach_task(struct rq *rq, struct task_struct *p)
        lockdep_assert_held(&rq->lock);
 
        BUG_ON(task_rq(p) != rq);
-       activate_task(rq, p, 0);
+       activate_task(rq, p, ENQUEUE_NOCLOCK);
        p->on_rq = TASK_ON_RQ_QUEUED;
        check_preempt_curr(rq, p, 0);
 }
@@ -6918,6 +6918,7 @@ static void attach_one_task(struct rq *rq, struct task_struct *p)
        struct rq_flags rf;
 
        rq_lock(rq, &rf);
+       update_rq_clock(rq);
        attach_task(rq, p);
        rq_unlock(rq, &rf);
 }
@@ -6933,6 +6934,7 @@ static void attach_tasks(struct lb_env *env)
        struct rq_flags rf;
 
        rq_lock(env->dst_rq, &rf);
+       update_rq_clock(env->dst_rq);
 
        while (!list_empty(tasks)) {
                p = list_first_entry(tasks, struct task_struct, se.group_node);