sched: update aggregate when holding the RQs

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It was observed that in __update_group_shares_cpu()

  rq_weight > aggregate()->rq_weight

This is caused by forks/wakeups in between the initial aggregate pass and
locking of the RQs for load balance. To avoid this situation partially re-do
the aggregation once we have the RQs locked (which avoids new tasks from
appearing).

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Peter Zijlstra 2008-06-27 13:41:19 +02:00 • committed by Ingo Molnar

parent b6a86c746f

commit 4d8d595dfa

1 changed files with 20 additions and 0 deletions

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kernel/sched.c

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