29 Jul
2004
29 Jul
'04
7:14 p.m.
On Thu, Jul 29, 2004 at 10:26:30PM +0200, Pavel Machek wrote:
Well, I do not follow you I guess.
With large-enough number of hardirqs you do no progress at all.
Even if only "sane" number of irqs, if they all decide to hit within one
getpid(), this getpid is going to take quite long....
Pavel
Ordinarily, yes. However, if it's a high-priority RT task that does
the getpid(), whose priority is higher than that of the RT tasks,
you'll get at most one hardirq stub per active IRQ number; after
that, the IRQs will be masked until their threads get a chance to be
scheduled.
-Scott