Re: [Xen-devel] RFC: Still TODO for 4.2? xl domain numa memory allocation vs xm/xend

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-01-20 at 09:47 +0000, Dario Faggioli wrote:
> On Fri, 2012-01-20 at 09:01 +0000, Ian Campbell wrote: 
> > > See this thread: 
> > > http://old-list-archives.xen.org/archives/html/xen-devel/2011-07/msg01423.html
> > > 
> > > where Stefano wrote:
> > > "I think we forgot about this feature but it is important and hopefully
> > > somebody will write a patch for it before 4.2 is out."
> > 
> > Is anyone looking into this?
> > 
> Hi,
> 
> Actually, I'll be investigating how we could gradually introduce some
> NUMA support in both the Xen scheduler and memory allocator!
> 
> I already have some ideas and I'm looking at the code to better
> understand it and find out what's the best strategy and from where it's
> better to start. I can give some more details, here or on separate
> thread, in a few days, if you're interested.
> 
> The only thing is that I'm not sure how far I'll be able to get before
> 4.2. I really think I'll have _something_ but maybe not a full-fledged
> NUMA-aware patchset! :-P

Sure, For 4.2 we should make sure that the toolstack does something
vaguely sensible.

> > Does cpupool-numa-split solve this same problem?
> > 
> I'm looking right into that, and indeed I think it does a lot in this
> direction. The idea was to try doing something similar in a sort of
> automatic fashion, so that everyone can benefit from at least some
> NUMA-awareness, even without having to bother with cpupools.
> 
> It that what you were asking?

Yes, thanks!

Ian


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