* Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx> wrote: > On Fri, Jan 29, 2010 at 08:39:07AM +0100, Ingo Molnar wrote: > > ... > > > When we merged kprobes ~10 years ago we made the (rather bad) mistake of > > merging a raw, opaque facility and leaving 'the rest' up to some other entity. > > IBM kprobes hackers vanished the day the original kprobes code went upstream > > and the high level entity never truly materialized in-kernel, for nearly a > > decade! > > I don't know what you are referring to here... Kprobes was merged in 2.6.9 > (~August 2004 -- less than 6 years ago). [...] Ok, 6 years then :-) > [...] Since then, we did work on ports to powerpc and s390. We implemented > kretprobes. We made it much scalable using RCU; we did the powerpc booster > to skip single-step when possible, not to mention various bug fixes over the > years. Except it had no real in-kernel user. > Yes, we did not do the perf integration, but perf did not exist then, > either. > > Its simply wrong to say people 'vanished'. It has certainly was a bit stale for years - and with no real users that's certainly not a surprise. That has changed recently so i'm not complaining. We just dont want to repeat the same mistake with uprobes. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
