Messages in this thread |  | | Date | Mon, 9 Jul 2018 16:43:38 +0200 | | From | Peter Zijlstra <> | | Subject | Re: [RFC] Make need_resched() return true when rcu_urgent_qs requested |
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On Mon, Jul 09, 2018 at 07:29:32AM -0700, Paul E. McKenney wrote:
> OK, so here are our options: > > 1. Add the RCU conditional to need_resched(), as David suggests. > Peter has concerns about overhead.
Not only overhead, its plain broken, because:
1) we keep preemption state in other places too 2) we check need_resched() in asm
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