* Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx> wrote: > On Fri, Jan 29, 2010 at 10:11:16AM +0100, Ingo Molnar wrote: > > > > * 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. > > Not that I want to rebut you Ingo, but there were in-kernel users since 2006 > (net/ipv4/tcp_probe.c) :-) i said 'real' users. That usage in tcp_probe.c was (and is) really minimal and never expanded really. > Aside, I am also glad that we have more flexibility with the perf > integration. ok, good :) 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
