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Re: [Libvir] [RFC][PATCH 0/2] Tested NUMA patches for available memory and topology



* Daniel Veillard <veillard redhat com> [2007-09-28 12:59]:
> On Fri, Sep 28, 2007 at 12:41:21PM -0500, Ryan Harper wrote:
> > * Elizabeth Kon <eak us ibm com> [2007-09-28 12:32]:
> > > >no, we can always get a total of _free_ memory, we just don't have a
> > > >call for _total_ ram (ie, free and non-free) -- only what's in the heap
> > > >(free mem).
> > > >
> > > > 
> > > >
> > > I asked DV about this off-list and he said he actually wanted total, not 
> > > free. DV please correct me if I misunderstood.
> > 
> > Ah, OK - the text as written mentions _free_ - which is why I responded.
> 
>   It seems a bit silly to me to have topology informations about which
> CPUs are part of the same Cell (i.e. share the same memory costs) but
> being unable to find out how much memory is actually local to that cell.
> Sure the current free heap on that cell helps to place new jobs but it's
> only a temporary view.

I don't see how having the total changes anything - we need current free
to determine where the next (even first) vm should go.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh us ibm com


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