On Thu, Mar 19, 2015 at 01:58:33PM -0700, Andrew Morton wrote: > OK. This code is basically required to support perf/ftrace and > modules, yes? Presumably small and space-constrained systems aren't > using either, so they don't take the hit. > > However CONFIG_MODULES systems which aren't using perf/ftrace _do_ take > a hit. How many systems are we talking here? All non-x86?
No, there's plenty !x86 systems that have NMI and perf/ftrace, in fact, ARM has them (FIQ) and there's event some ARM chips that use them for perf (i.MX6 is one). But sure, we could make this depend on CONFIG_PERF_EVENTS || CONFIG_TRACING. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
