Re: [RFC Patch V1 00/30] Enable memoryless node on x86 platforms

Peter Zijlstra <[email protected]> Fri, 11 Jul 2014 20:51:06 +0000

Newsgroups	org.kernel.vger.linux-hotplug,org.kernel.vger.linux-kernel,org.kvack.linux-mm
Message-ID	<[email protected]>

On Fri, Jul 11, 2014 at 01:20:51PM -0700, Andi Kleen wrote:
> Greg KH <[email protected]> writes:
> 
> > On Fri, Jul 11, 2014 at 10:29:56AM +0200, Peter Zijlstra wrote:
> >> On Fri, Jul 11, 2014 at 03:37:17PM +0800, Jiang Liu wrote:
> >> > Any comments are welcomed!
> >> 
> >> Why would anybody _ever_ have a memoryless node? That's ridiculous.
> >
> > I'm with Peter here, why would this be a situation that we should even
> > support?  Are there machines out there shipping like this?
> 
> We've always had memory nodes.
> 
> A classic case in the old days was a two socket system where someone
> didn't populate any DIMMs on the second socket.

That's a obvious; don't do that then case. Its silly.

> There are other cases too.

Are there any sane ones?