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It is possible that at task_numa_placement() time, the task's numa_preferred_nid does not change, but the task is not actually running on the preferred node at the time. In that case, we still want to attempt migration to the preferred node. Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: mgorman@suse.de Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20140604163315.1dbc7b56@cuia.bos.redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>