Re: [PATCH 2/2] perf record: Replace 'overwrite' by 'flightrecorder' for better naming

[Wangnan (F)]

On 2017/11/1 18:03, Namhyung Kim wrote:
> On Wed, Nov 01, 2017 at 05:53:27AM +0000, Wang Nan wrote:
> > The meaning of perf record's "overwrite" option and many "overwrite" in
> > source code are not clear. In perf's code, the 'overwrite' has 2 meanings:
> >   1. Make ringbuffer readonly (perf_evlist__mmap_ex's argument).
> >   2. Set evsel's "backward" attribute (in apply_config_terms).
> >
> > perf record doesn't use meaning 1 at all, but have a overwrite option, its
> > real meaning is setting backward.
> >
> > This patch separates these two concepts, introduce 'flightrecorder' mode
> > which is what we really want. It combines these 2 concept together, wraps
> > them into a record mode. In flight recorder mode, perf only dumps data before
> > something happen.
> I'm ok with the it but removing old name looks not good.  How about
> keeping them for a while (as deprecated)?.

Is there a way to hide '--overwrite' from 'perf record --help' and print 
something
when user really use it?

> And 'flightrecorder' seems too long.  Maybe you can use an acronym
> like FDR or fdr-mode?

fdr-mode is a good name.

Thank you.