Hi!
> > > @@ -61,10 +60,13 @@ static inline void freeze_process(struct
> > > unsigned long flags;
> > >
> > > if (!freezing(p)) {
> > > - freeze(p);
> > > - spin_lock_irqsave(&p->sighand->siglock, flags);
> > > - signal_wake_up(p, 0);
> > > - spin_unlock_irqrestore(&p->sighand->siglock, flags);
> > > + rmb();
> >
> > If frozen is atomic_t, do we need memory barrier?
>
> I think so. For example on x86-64 atomic_read() is just a read.
Sorry for one more change, but
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/
static inline void set_tsk_thread_flag(struct task_struct *tsk, int
flag)
{
set_ti_thread_flag(task_thread_info(tsk), flag);
}
...could we use set_tsk_thread_flag and friends to avoid enlarging
task struct?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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