Re: Re: freeze_processes questions

[Pavel Machek <pavel@ucw.cz>]

[-- Attachment #1: Type: text/plain, Size: 1140 bytes --]

Hi!

> > > > OTOH... we may want to move completely away from refrigerator. Its
> > > > quite a hack, and it device support is okay, we'll not really need it.
> > > 
> > > Still, it won't happen soon, I guess. :-)  As of today, we have the
> > > refrigerator and the processes in TASK_UNINTERRUPTIBLE are mishandled.
> > > I think we should do something about it, at least for now, until we drop
> > > the refrigerator altogether (if we are going to drop it).  That's why I
> > > started the discussion and sent the patch.
> > 
> > It's very simple.  Processes in TASK_UNINTERRUPTIBLE can't be put in the
> > refrigerator, so you have to wait until they can be put there.
> 
> It seems that if a process calls wait_for_completion() right before suspend,
> the other task supposed to complete its completion may be accidentally frozen
> before it's able to do this.  It looks like this happens to kseroid sometimes
> on suspend-during-resume.

Hmm, so maybe rule needs to be "other tasks may not be waiting on you
using wait_for_completion when you enter refrigerator?
								Pavel
-- 
Boycott Kodak -- for their patent abuse against Java.

[-- Attachment #2: Type: text/plain, Size: 0 bytes --]