RE: [PATCH] freezer: fix freeze timeout on exec

["Chanho Min" <chanho.min@lge.com>]

> >
> > To fix this, I suggest a patch by emboding the mentioned solution.
> > First, revive and rework cancel_freezing_and_thaw() function whitch
> > stops the task from sleeping in refrigirator reliably. And, The task
> > to be killed does not allow to freeze.
> 
> Can't we simply change de_thread() to use freezable_schedule() ?
> 
> Oleg.

We need to change freezable_schedule_timeout() instead.
freezable_schedule also can't be frozen if sub-threads can't stop
schedule().
Furthermore, I'm not sure if it is safe to freeze it at de_thread().

diff --git a/fs/exec.c b/fs/exec.c
index 9c5ee2a..291cbd6 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -942,7 +942,7 @@ static int de_thread(struct task_struct *tsk)
        while (sig->notify_count) {
                __set_current_state(TASK_KILLABLE);
                spin_unlock_irq(lock);
-               schedule();
+               while (!freezable_schedule_timeout(HZ));
                if (unlikely(__fatal_signal_pending(tsk)))
                        goto killed;
                spin_lock_irq(lock);

Chanho