Re: [PATCH 0/12] cleanup __build_sched_domains()

Peter Zijlstra
2009-08-18T13:25:55Z

On Tue, 2009-08-18 at 15:15 +0200, Andreas Herrmann wrote:
>
> > I'd also not be surprised if the load-balancer needed some care to
> > properly handle such a setup.
>
> It needs some care and gave me some headache to get it working in all
> cases (i.e. NUMA, no-NUMA, NUMA-but-no-SRAT). My current code (that
> still needs to be split in proper patches for submission) works fine
> in all but one case. And I am still debugging it.
>
> The case that is not working is a normal (non-multi-node) NUMA system
> on which switching to power policy does not take effect for already
> running tasks. Just the new created ones are scheduled according to
> the power policy.

Note that current upstream is broken here in a way that isn't fixable in
a straight fwd way. Ego and vatsa were looking into that iirc.