linux-kernel - Re: change uprobe_events default ? Was: [PATCH] perf: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE

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Message-ID: <20170316064055.GA7130@gmail.com>
Date:   Thu, 16 Mar 2017 07:40:55 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Anton Blanchard <anton@...abs.org>,
        David Miller <davem@...emloft.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Hemant Kumar <hemant@...ux.vnet.ibm.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
        Wang Nan <wangnan0@...wei.com>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
        alexander.shishkin@...ux.intel.com, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: change uprobe_events default ? Was: [PATCH] perf: Rename
 CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS


* Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> Added more people to the CC list.
> 
> Em Wed, Mar 15, 2017 at 05:58:19PM -0700, Alexei Starovoitov escreveu:
> > On Thu, Feb 16, 2017 at 05:00:50PM +1100, Anton Blanchard wrote:
> > > We have uses of CONFIG_UPROBE_EVENT and CONFIG_KPROBE_EVENT as
> > > well as CONFIG_UPROBE_EVENTS and CONFIG_KPROBE_EVENTS. Consistently
> > > use the plurals.
>  
> > this rename made me notice that UPROBE_EVENTS still defaults to 'n'.
> > this is key feature that all distros enable, so having default 'n'
> > is kinda saying that it's not something that should be turned on
> > or used widely. which is obviously not the case.
> > imo it's time to change it to 'y'.
> > Thoughts?
> 
> Agreed, I also found it strange that it was disabled by default when I
> recently did a 'make oldconfig' :-\

Agreed, someone please send a patch (or feel free to include it in the perf 
tooling tree) to switch the default around.

Thanks,

	Ingo