Re: [RFC&PATCH] Alternative RCU implementation

Paul E. McKenney
2004-09-01T03:57:50Z

On Mon, Aug 30, 2004 at 11:22:49PM -0400, Jim Houston wrote:
> On Mon, 2004-08-30 at 14:52, Paul E. McKenney wrote:
> > How does the rest of the kernel work with all interrupts to
> > a particular CPU shut off? For example, how do you timeslice?
>
> It's a balancing act. In some cases we just document the
> missing functionality. If the local timer is disabled on a cpu,
> all processes are SCHED_FIFO. In the case of Posix timers, we
> move timers to honor the procesor shielding an the process affinity.

I have to ask... When you say that you move the timers, you mean that
non-realtime CPU 1 managers timers for realtime CPU 0, so that CPU 1
is (effectively) taking CPU 0's timer interrupts?

Thanx, Paul