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Hello! > > We had one full solution for this issue not changing anything > > in scheduler/softirq relationship: to run rcu task for the things > > sort of dst cache not from process context, but essentially as part > > of do_softirq(). Simple, stupid and apparently solves new problems > > which rcu created. > > Can you be a little bit more specific about this solution ? It is about that your suggestion, which you outlined below :-) > as indicated by my earlier experiments. We have potential fixes > for RCU through a call_rcu_bh() interface where completion of a > softirq handler is a quiescent state. I am working on forward porting > that old patch from our discussion last year and testing in my > environment. That should increase the number of quiescent state > points significantly and hopefully reduce the grace period significantly. > But this does nothing to help userland starvation. Alexey - 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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