sched: Prevent buddy interactions with throttled entities

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Buddies allow us to select "on-rq" entities without actually selecting them
from a cfs_rq's rb_tree.  As a result we must ensure that throttled entities
are not falsely nominated as buddies.  The fact that entities are dequeued
within throttle_entity is not sufficient for clearing buddy status as the
nomination may occur after throttling.

Signed-off-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110721184757.886850167@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Paul Turner 2011-07-21 09:43:37 -07:00 • committed by Ingo Molnar

parent 64660c864f

commit 5238cdd387

1 changed files with 17 additions and 1 deletions

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kernel/sched_fair.c

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