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authorRik van Riel <[email protected]>2014-08-04 13:23:27 -0400
committerIngo Molnar <[email protected]>2014-08-12 12:48:22 +0200
commitb932c03c34f3b03c7364c06aa8cae5b74609fc41 (patch)
tree8be6adf0a790ddec698483143800893e791a3d3c /tools/perf/scripts/python/bin
parentaaecac4ad46b35ad308245384d019633fb9bc21b (diff)
sched/numa: Fix off-by-one in capacity check
Commit a43455a1d572daf7b730fe12eb747d1e17411365 ensures that task_numa_migrate will call task_numa_compare on the preferred node all the time, even when the preferred node has no free capacity. This could lead to a performance regression if nr_running == capacity on both the source and the destination node. This can be avoided by also checking for nr_running == capacity on the source node, which is one stricter than checking .has_free_capacity. Signed-off-by: Rik van Riel <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Linus Torvalds <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
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