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: <698eeeeb-2181-28b3-08dd-018fc5ccd011@gmail.com>
Date:   Wed, 15 Mar 2017 19:10:56 -0600
From:   David Ahern <dsahern@...il.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Anton Blanchard <anton@...abs.org>,
        David Miller <davem@...emloft.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.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>,
        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

On 3/15/17 7:06 PM, Arnaldo Carvalho de Melo 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' :-\

Debian stretch, Ubuntu 16.10, Fedora 26 all have it enabled. Perhaps it
should default on.