sched: only update rq->clock while holding rq->lock

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Vatsa noticed rq->clock going funny and tracked it down to an update_rq_clock()
outside a rq->lock section.

This is a problem because things like double_rq_lock() update the rq->clock
value for both rqs. Therefore disabling interrupts isn't strong enough.

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

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Peter Zijlstra 2008-10-15 20:37:23 +02:00 • committed by Ingo Molnar

parent 5b16a2212f

commit 8cd162ce23

1 changed files with 1 additions and 5 deletions

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kernel/sched.c

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