forked from luck/tmp_suning_uos_patched
sched: Fix bug in SCHED_IDLE interaction with group scheduling
One of the isolation modifications for SCHED_IDLE is the unitization of sleeper credit. However the check for this assumes that the sched_entity we're placing always belongs to a task. This is potentially not true with group scheduling and leaves us rummaging randomly when we try to pull the policy. Signed-off-by: Paul Turner <pjt@google.com> Cc: peterz@infradead.org LKML-Reference: <alpine.DEB.1.00.0907101649570.29914@kitami.corp.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -687,7 +687,8 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
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* all of which have the same weight.
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*/
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if (sched_feat(NORMALIZED_SLEEPER) &&
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task_of(se)->policy != SCHED_IDLE)
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(!entity_is_task(se) ||
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task_of(se)->policy != SCHED_IDLE))
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thresh = calc_delta_fair(thresh, se);
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vruntime -= thresh;
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