Re: [PATCH 5/8] sched: Favour moving tasks towards the preferred node

[Peter Zijlstra]

On Wed, Jun 26, 2013 at 03:38:04PM +0100, Mel Gorman wrote:
> This patch favours moving tasks towards the preferred NUMA node when
> it has just been selected. Ideally this is self-reinforcing as the
> longer the the task runs on that node, the more faults it should incur
> causing task_numa_placement to keep the task running on that node. In
> reality a big weakness is that the nodes CPUs can be overloaded and it
> would be more effficient to queue tasks on an idle node and migrate to
> the new node. This would require additional smarts in the balancer so
> for now the balancer will simply prefer to place the task on the
> preferred node for a tunable number of PTE scans.

This changelog fails to mention why you're adding the settle stuff in
this patch.
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