Messages in this thread | | | Date | Sat, 9 Aug 2014 08:44:39 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH v3 tip/core/rcu 1/9] rcu: Add call_rcu_tasks() |
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On Sat, 9 Aug 2014 08:15:14 +0200 Peter Zijlstra <peterz@infradead.org> wrote:
> As for idle tasks, I'm not sure about those, I think that we should say > NO to anything that would require waking idle CPUs, push the pain to > ftrace/kprobes, we should _not_ be waking idle cpus.
I agree, but I haven't had a chance to review the patch set (will probably do that on Monday, just got back from vacation last week and was inundated by other things). Does the idle waking happen only when there's something queued in the call_rcu_tasks()? It should definitely not be waking all the time. That's just wrong.
But if it only wakes when something is queued, it wouldn't be burdening anything, unless it is needed.
-- Steve
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