linux-kernel - Re: [RFC] tools lib traceevent: How to do library versioning being in the Linux kernel source?

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Message-Id: <20200105221814.ed6a53012ec9945296029add@kernel.org>
Date:   Sun, 5 Jan 2020 22:18:14 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Linux Trace Devel <linux-trace-devel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC] tools lib traceevent: How to do library versioning being
 in the Linux kernel source?

On Fri, 3 Jan 2020 18:12:42 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Fri, 3 Jan 2020 21:17:43 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > +1. It sounds reasonable to move the main part of libtraceevent out
> > of kernel tree. BTW, the plugins seems depending on the kernel. Maybe
> > we can provide it under
> > /lib/modules/<kversion>/shared/libtraceevent/plugins/ ? :)
> 
> They really shouldn't be. They should be able to be used between
> different versions of the kernel. Which plugins do you see an issue
> with?

I meant tools/lib/traceevent/plugins.
It seems that those plugins provide equivarent codes of some macros
or values in event formats. In that case, when a new kernel modifies
the event definitions, I think some of those needs to be updated too.
Or, would those events be considered as a stable ABI?

Thank you,

-- 
Masami Hiramatsu <mhiramat@...nel.org>