Re: nmi_watchdog fix for x86_64 to be more like i386

[Paul E. McKenney]

On Mon, Oct 01, 2007 at 12:56:26PM -0700, Arjan van de Ven wrote:
> On Mon, 1 Oct 2007 21:27:39 +0200 (CEST)
> 
> > > I already did this here by checking for cpu != 0. But it also needs
> > > either tracking or forbidding migrations of irq 0. I can take care
> > > of the patch.
> > 
> > I was thinking about the same fix. On i386 we already have the irq 
> > migration / balancing of irq 0 disabled. That's why we setup IRQ0 with
> > IRQ_NOBALANCING.
> 
> btw doing this is a problem if the user decides to hot(un)plug cpu 0...
> he then can't move the irqs away to do that

Last I tried it, x86_64 and i386 in fact prohibit hotunplugging CPU 0.

						Thanx, Paul
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