> > For -fpatchable-function-entries I switched > > off IPA-RA, as especially on RISC there's _nothing_ you can do between > > functions without at least one scratch reg. But for live patching, I'd like > > the kernel to be compiled in the first place with 100% ABI adherence, IOW > > all IPA optimisations turned off. Does anyone have numbers on the performance > > impact? > > I agree that would be the best option. > > I don't think anyone has measured it because we don't know how to get > the compiler to do that :-) My guess is that it will be something close > to negligible. I asked Nicolai to do some performance testing with all the options that could be disabled disabled. Miroslav -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
