On 01/02/2008, Ingo Molnar <[EMAIL PROTECTED]> wrote:
>
> * Dmitry Adamushko <[EMAIL PROTECTED]> wrote:
>
> > > I've observed delays from ~3 s. up to ~8 s. (out of ~20 tests) so
> > > the 10s. delay of msleep_interruptible() might be related but I'm
> > > still looking for the reason why this fix helps (and what goes wrong
> > > with the current code).
> >
> > heh... it's pretty obvious indeed. What's msleep_interruptible() is
> > all about? :-)
> >
> > "sleep waiting for signals"
> >
> > so the 'watchdog' thread gets woken up
> >
> > [ as a result of cpu_callback(action = CPU_DEAD) --> kthread_stop() ]
> >
> > just to be immediately scheduled out again for as long as the
> > remaining timeout > 0.
> >
> > So it should work if we substitute msleep_interruptible() with
> > schedule_timeout_interruptible().
>
> Doh. Could someone with ths problem please test the patch below, does it
> do the trick?
yeah, I was already on a half-way to check it out.
It does fix a problem for me.
Don't forget to take along these 2 fixes from Peter's patch:
- fix break usage in do_each_thread() { } while_each_thread().
- fix the hotplug switch stmt, a fall-through case was broken.
Rafael, does your system still hangs? I'd expect, yes -- as
effectively this fix is not that different from Peter's one when it
comes to suspend-case.
Can you then send your config? Anything special about this machine
(say, some /proc tunables are altered)?
>
> Ingo
>
--
Best regards,
Dmitry Adamushko
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
