Messages in this thread | | | Date | Fri, 06 Jan 2006 14:09:40 +0100 | From | Eric Dumazet <> | Subject | Re: [PATCH, RFC] RCU : OOM avoidance and lower latency |
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Andi Kleen a écrit : > On Friday 06 January 2006 11:17, Eric Dumazet wrote: > >> I assume that if a CPU queued 10.000 items in its RCU queue, then the >> oldest entry cannot still be in use by another CPU. This might sounds as a >> violation of RCU rules, (I'm not an RCU expert) but seems quite reasonable. > > I don't think it's a good assumption. Another CPU might be stuck in a long > running interrupt, and still have a reference in the code running below > the interrupt handler. > > And in general letting correctness depend on magic numbers like this is > very nasty. >
I agree Andi, I posted a 2nd version of the patch with no more assumptions.
Eric
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