Re: A question on RCU vs. preempt-RCU

From: Rusty Russell
Date: Tue Jun 18 2013 - 03:11:30 EST

Tejun Heo <tj@xxxxxxxxxx> writes:
> Buth yeah, interesting trick. We'll be doing IPIs, flushing TLB and
> taking faults until it hits zero. It'll all depend on the frequency
> of preemption but given that branches don't tend to be too expensive
> on modern processors, maybe it'd be a bit too hairy for possibly
> marginal gain?

Yeah, I'm not convinced either, but I am hoping some enthusiast will run
with the idea in hope of Fame and Glory :)

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