Re: [PATCH] tracing/markers: make markers select tracepoints

Frank Ch. Eigler
2009-02-22T12:24:54Z

Hi -

On Sun, Feb 22, 2009 at 01:14:36PM +0100, Peter Zijlstra wrote:
> > > I would like to never merge an ftrace_printk() user... just as I'd like
> > > to get rid of every marker.
> >
> > But why? They solve a problem well enough that Ingo had in effect
> > reinvented them on Friday.
>
> Because after a printk() debug spree, I don't commit them, I toss them
> out and keep the fix.

Markers solve a problem closer to tracepoints than to debugging
printk's.

In this context, the main difference between tracepoints is that
markers need almost no hand-written glue code of the sort that make up
ftrace engines that just trace simple values. Simpler & smaller code
for the same output seems like a win.

- FChE