Messages in this thread | | | Date | Tue, 6 Mar 2012 22:47:40 +0800 | Subject | Re: [RFC PATCH 5/6] implement per-cpu&per-domain state machine call_srcu() | From | Lai Jiangshan <> |
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> >> + } >> + } >> + spin_unlock_irq(&sp->gp_lock); >> + >> + flush_workqueue(srcu_callback_wq); > > Since you already waited for the completions one by one, what's the > purpose of this?
srcu callbacks are preemptible/sleepable here, so they may not complete in order, some may not finish here. so srcu_barrier() needs to wait them.
> >> +} >> +EXPORT_SYMBOL_GPL(srcu_barrier); > -- > 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/ -- 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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