* Ingo Molnar <mingo@xxxxxxxxxx> wrote: > > I don't think you want to spend that many cycles in the NMI > > handler for a dubious feature. Ok in theory you could > > add something with binary search, but that would be quite > > a bit of effort and it would be probably challenging > > to do that all NMI safe. > > If anyone using LBR sees that overhead it can be improved. You or others > who care can improve it. Also, improving the performance of is_module_text() shouldn't be too hard: an RCU rbtree should be enough. It's NMI-safe: when the rb-tree is in the middle of a rotation we'll simply not find the address and 'revert' to the worst case non-filtering your patch does all the time, but in the likely case it does find it and works as expected. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html