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Re: Re: Hang with fair cgroup scheduler (reproducer is attached.) [message #25136 is a reply to message #25135] Sat, 15 December 2007 10:50 Go to previous messageGo to previous message
Dhaval Giani is currently offline  Dhaval Giani
Messages: 37
Registered: June 2007
Member
On Sat, Dec 15, 2007 at 11:22:08AM +0100, Dmitry Adamushko wrote:
> On 14/12/2007, Steven Rostedt <rostedt@goodmis.org> wrote:
> >
> > On Fri, 14 Dec 2007, Dmitry Adamushko wrote:
> >
> > >
> > > argh... it's a consequence of the 'current is not kept within the tree" indeed.
> > >
> >
> > Thanks Dmitry for tracking this down.
> 
> My analysis was flawed (hmm... me was under control of Belgium beer :-)
> 
> The task in not on the runqueue (p->on_rq == 0) at the moment when
> put_prev_task_fair() and set_curr_task_fair() get its turn in
> sched_move_task()... so dequeue/enqueue_entity() are not triggered,
> that's good.
> 

Again, I am probably missing something, but if on_rq == 0, then how is
set_curr_task_fair() getting called?

-- 
regards,
Dhaval
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