Re: [RFC/PATCH 0/4] cpus, nodes, and the device model: dynamic cpu registration

Nathan Lynch
2004-10-25T11:20:43Z

On Mon, 2004-10-25 at 16:12 +1000, Rusty Russell wrote:
> On Sun, 2004-10-24 at 03:42 -0600, Nathan Lynch wrote:
> > For starters, the current situation is that cpu sysdevs are registered
> > from architecture code at boot. Already we have inconsistencies
> > betweeen the arches -- ia64 registers only online cpus, ppc64
> > registers all "possible" cpus.
>
> Um, how does ia64 bring up a new CPU without
> a /sys/devices/system/cpu/cpuX/online?

I don't think they have that capability merged yet, but I have seen a
few patches for ACPI-based physical hotplug support go by, e.g.
http://lkml.org/lkml/2004/9/20/126

Nathan