On Fri, Jan 29, 2010 at 01:22:40PM +0530, Ananth N Mavinakayanahalli 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). 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. > > Yes, we did not do the perf integration, but perf did not exist then, either. > > Its simply wrong to say people 'vanished'.
Oh, and the x86 instruction decoder was initially implemented by us. Masami has done a great job making it more complete. Ananth
