Messages in this thread | | | Date | Mon, 4 Jun 2018 06:48:52 -0700 | From | Srikar Dronamraju <> | Subject | Re: [PATCH 04/19] sched/numa: Set preferred_node based on best_cpu |
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* Peter Zijlstra <peterz@infradead.org> [2018-06-04 15:39:53]:
> > > > > > That seems to entirely loose the active_node thing, or are you saying > > > best_cpu already includes that? (Changelog could use a little help there > > > I suppose) > > > > I think checking for active_nodes before calling sched_setnuma was a > > mistake. > > > > Before this change, we may be retaining numa_preferred_nid to be the > > source node while we select another node with better numa affinity to > > run on. So we are creating a situation where we force a thread to run on > > a node which is not going to be its preferred_node. So in the course of > > regular load balancing, this task might then be moved to set > > preferred_node which is actually not the preferred_node. > > Then your Changelog had better explain all that, no? >
I had mentioned "Modify to set the preferred node based of best_cpu." I will update that to describe the situation.
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