linux-kernel - Re: [PATCH 0/12] cleanup __build_sched

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Date:	Tue, 18 Aug 2009 15:25:41 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andreas Herrmann <andreas.herrmann3@....com>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Gautham Shenoy <ego@...ibm.com>,
	Vatsa <vatsa@...ux.vnet.ibm.com>
Subject: Re: [PATCH 0/12] cleanup __build_sched_domains()

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.
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