Re: nmi_watchdog fix for x86_64 to be more like i386

[Dave Jones]

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
 
You can't hot unplug cpu0.
Take a look in sysfs, no /sys/devices/system/cpu/cpu0/online file.

	Dave

-- 
http://www.codemonkey.org.uk
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/