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* Paul E. McKenney <paulmck@us.ibm.com> wrote: > Hello! > > Applying RCU to the task structure broke oprofile, because > free_task_notify() can now be called from softirq. This means that > the task_mortuary lock must be acquired with irq disabled in order to > avoid intermittent self-deadlock. Since irq is now disabled, the > critical section within process_task_mortuary() has been restructured > to be O(1) in order to maximize scalability and minimize realtime > latency degradation. > > Kudos to Wu Fengguang for finding this problem! thanks, i applied this to the -rt tree. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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