Re: [PATCH] Dynamic tick, version 050127-1

[Zwane Mwaikambo]

On Fri, 4 Feb 2005, Tony Lindgren wrote:

> * Zwane Mwaikambo <zwane@xxxxxxxxxxxxxxxx> [050204 09:31]:
> > On Fri, 4 Feb 2005, Tony Lindgren wrote:
> > 
> > > Yes, it's safer to keep the timer periodic, although it's
> > > used for oneshot purposes for the skips. If the timer interrupt
> > > got missed for some reason, the system would be able to recover when
> > > it's in periodic mode.
> > > 
> > > And with some timers, we can do the reprogramming faster, as we just
> > > need to load the new value.
> > > 
> > > I could not figure out how to disable the interrupts for PIT
> > > when local APIC is used and the ticks to skip is longer than PIT
> > > would allow. So I just changed the mode temporarily to disable it.
> > >
> > > Does anybody know if there's a way to stop PIT interrupts while
> > > keeping it in the periodic mode?
> > 
> > disable_irq(0) ?
> 
> Then the problem is that the CPU does not stay in sleep but wakes to
> the first PIT interrupt AFAIK.

I do not understand, do you want to disable the PIT from interrupting the 
processor and enable it interrupting at a later time?
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