Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

Ingo Molnar
2006-09-16T08:29:24Z

* Roman Zippel <zippel@linux-m68k.org> wrote:

> [...] It would also add virtually no maintainance overhead as you like
> to claim - how often does this function change?

as i said, roughly half of the tracepoints are like this - and some of
them in functions in frequented places. That's far from "virtually no
maintainance overhead". In the -rt tree i have never more than a dozen
static tracepoints, yet even this small amount caused at least 5 extra
-rt tree iterations due to various breakages (build problems or even
crashes). Cruft comes in small steps, and my worry is that such
_unremovable_ markups will be cruft that never shrinks. With dynamic
tracers i see the _chance_ for cruft to shift to places where it does
not hurt, if that cruft turns out to become a hindrance.

Ingo