diff options
| author | Junjie Wu <junjiew@codeaurora.org> | 2016-01-05 10:53:30 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 21:25:17 -0700 |
| commit | efa673322fd6917acb69361fc01f746a13b3fcde (patch) | |
| tree | 870145507079abe1e9ffba81314888533c2b7745 /include | |
| parent | 71a8c392b7f024f8e1ce08ec1401c321f7323cb3 (diff) | |
sched: Provide a wake up API without sending freq notifications
Each time a task wakes up, scheduler evaluates its load and notifies
governor if the resulting frequency of destination CPU is larger than
a threshold. However, some governor wakes up a separate task that
handles frequency change, which again calls wake_up_process().
This is dangerous because if the task being woken up meets the
threshold and ends up being moved around, there is a potential for
endless recursive notifications.
Introduce a new API for waking up a task without triggering
frequency notification.
Change-Id: I24261af81b7dc410c7fb01eaa90920b8d66fbd2a
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index b61d039b665f..59eb23e73fa0 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2596,6 +2596,7 @@ extern void xtime_update(unsigned long ticks); extern int wake_up_state(struct task_struct *tsk, unsigned int state); extern int wake_up_process(struct task_struct *tsk); +extern int wake_up_process_no_notif(struct task_struct *tsk); extern void wake_up_new_task(struct task_struct *tsk); #ifdef CONFIG_SMP extern void kick_process(struct task_struct *tsk); |