[haiku-development] Re: The new locking primitives and boosting -- I need some guidance here :)

  • From: "François Revol" <revol@xxxxxxx>
  • To: haiku-development@xxxxxxxxxxxxx
  • Date: Wed, 25 Jun 2008 22:52:27 +0200 CEST

> On Wed, Jun 25, 2008 at 09:50, François Revol <revol@xxxxxxx> wrote:
> > I think meant RT prio vs non-root.
> > RT priority threads can hog the system, which shouldn't be doable
> > by a
> > user.
> Actually it doesn't make much sense for a user that's not sitting on
> the console to be allowed anything above B_NORMAL_PRIORITY (as its
> priority value is 10, and B_DISPLAY_PRIORITY is quite close at 15).

Just like Linux forbids non root to use negative nice even outside the
RT class.

> > There I think some capability based system should help.
> Definitely. And there's already some groundwork laid on the scheduler
> for this to be pretty easy to implement.
> > When logging in a user would just be granted the RT cap for his
> > session.
> Well, this doesn't require a full-blown capability model like
> scheduling groups, but it sure is a nice workaround ;)

Well other things like allowed mounting, using devices (scanner,
printers...), ... should be done by users at the console.


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