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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-02-29 15:21:01 -0500
committerIngo Molnar <mingo@elte.hu>2008-03-07 16:42:59 +0100
commit810b38179e9e4d4f57b4b733767bb08f8291a965 (patch)
tree91692de4fbd46879b29d803839b5bf7e25f30cd8 /kernel/sched.c
parentce4796d1e16cf3761dc2a02b8d588667d05b3078 (diff)
downloadop-kernel-dev-810b38179e9e4d4f57b4b733767bb08f8291a965.zip
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sched: retain vruntime
Kei Tokunaga reported an interactivity problem when moving tasks between control groups. Tasks would retain their old vruntime when moved between groups, this can cause funny lags. Re-set the vruntime on group move to fit within the new tree. Reported-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index dcd553c..0b949c4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -7625,6 +7625,11 @@ void sched_move_task(struct task_struct *tsk)
set_task_rq(tsk, task_cpu(tsk));
+#ifdef CONFIG_FAIR_GROUP_SCHED
+ if (tsk->sched_class->moved_group)
+ tsk->sched_class->moved_group(tsk);
+#endif
+
if (on_rq) {
if (unlikely(running))
tsk->sched_class->set_curr_task(rq);
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