Seems it's not necessary to adjust the task state and revisit the state of source and destination cgroups if the cgroups are not in freeze state and the task itself is not frozen. Signed-off-by: Honglei Wang <honglei.wang@xxxxxxxxxx> --- kernel/cgroup/freezer.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/kernel/cgroup/freezer.c b/kernel/cgroup/freezer.c index 8cf010680678..2dd66551d9a6 100644 --- a/kernel/cgroup/freezer.c +++ b/kernel/cgroup/freezer.c @@ -230,6 +230,15 @@ void cgroup_freezer_migrate_task(struct task_struct *task, if (task->flags & PF_KTHREAD) return; + /* + * It's not necessary to do changes if both of the src and dst cgroups + * are not freeze and task is not frozen. + */ + if (!test_bit(CGRP_FREEZE, &src->flags) && + !test_bit(CGRP_FREEZE, &dst->flags) && + !task->frozen) + return; + /* * Adjust counters of freezing and frozen tasks. * Note, that if the task is frozen, but the destination cgroup is not -- 2.17.0
