| Date | Mon, 07 Oct 2013 14:58:00 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 32/63] sched: Avoid overloading CPUs on a preferred NUMA node |
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On 10/07/2013 06:29 AM, Mel Gorman wrote: > This patch replaces find_idlest_cpu_node with task_numa_find_cpu. > find_idlest_cpu_node has two critical limitations. It does not take the > scheduling class into account when calculating the load and it is unsuitable > for using when comparing loads between NUMA nodes. > > task_numa_find_cpu uses similar load calculations to wake_affine() when > selecting the least loaded CPU within a scheduling domain common to the > source and destimation nodes. It avoids causing CPU load imbalances in > the machine by refusing to migrate if the relative load on the target > CPU is higher than the source CPU. > > Signed-off-by: Peter Zijlstra <peterz@infradead.org> > Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
-- All rights reversed
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