sched: Fix race between ttwu() and task_rq_lock()

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Thomas found that due to ttwu() changing a task's cpu without holding
the rq->lock, task_rq_lock() might end up locking the wrong rq.

Avoid this by serializing against TASK_WAKING.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1266241712.15770.420.camel@laptop>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Peter Zijlstra 2010-02-15 14:45:54 +01:00 • committed by Thomas Gleixner

parent 9000f05c6d

commit 0970d2992d

1 changed files with 46 additions and 27 deletions

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kernel/sched.c

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