X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=kernel%2Fsched_fair.c;h=f4f6a8326dd01ffc0353b369bbfddf5a4f0e2fde;hb=37542b6a7e73e81f8c066a48e6911e476ee3b22f;hp=933f3d1b62ea0affb63767f87152545f7659dc6f;hpb=fbaab1dc19751c80a7df62425f1d9ad2688e42f5;p=karo-tx-linux.git

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 933f3d1b62ea..f4f6a8326dd0 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -3869,13 +3869,26 @@ static void set_curr_task_fair(struct rq *rq)
 }
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-static void moved_group_fair(struct task_struct *p, int on_rq)
+static void task_move_group_fair(struct task_struct *p, int on_rq)
 {
-	struct cfs_rq *cfs_rq = task_cfs_rq(p);
-
-	update_curr(cfs_rq);
+	/*
+	 * If the task was not on the rq at the time of this cgroup movement
+	 * it must have been asleep, sleeping tasks keep their ->vruntime
+	 * absolute on their old rq until wakeup (needed for the fair sleeper
+	 * bonus in place_entity()).
+	 *
+	 * If it was on the rq, we've just 'preempted' it, which does convert
+	 * ->vruntime to a relative base.
+	 *
+	 * Make sure both cases convert their relative position when migrating
+	 * to another cgroup's rq. This does somewhat interfere with the
+	 * fair sleeper stuff for the first placement, but who cares.
+	 */
+	if (!on_rq)
+		p->se.vruntime -= cfs_rq_of(&p->se)->min_vruntime;
+	set_task_rq(p, task_cpu(p));
 	if (!on_rq)
-		place_entity(cfs_rq, &p->se, 1);
+		p->se.vruntime += cfs_rq_of(&p->se)->min_vruntime;
 }
 #endif
 
@@ -3927,7 +3940,7 @@ static const struct sched_class fair_sched_class = {
 	.get_rr_interval	= get_rr_interval_fair,
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-	.moved_group		= moved_group_fair,
+	.task_move_group	= task_move_group_fair,
 #endif
 };