linux-kernel - Re: [PATCH] ebpf, events: make it actually more configurable

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Message-ID: <20151003082448.GA27061@gmail.com>
Date:	Sat, 3 Oct 2015 10:24:48 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Daniel Borkmann <daniel@...earbox.net>
Cc:	linux-kernel@...r.kernel.org,
	Alexei Starovoitov <ast@...mgrid.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] ebpf, events: make it actually more configurable


* Daniel Borkmann <daniel@...earbox.net> wrote:

> On 10/03/2015 08:37 AM, Ingo Molnar wrote:
> >
> >* Daniel Borkmann <daniel@...earbox.net> wrote:
> >
> >>While testing some other BPF issue, I realized that BPF_EVENTS is
> >>actually not accessible through menuconfig because of a missing
> >>description that needs to be attached to the bool. After the patch
> >>the entry shows up in menuconfig and can be enabled/disabled from
> >>there.
> >
> > Yeah, so the principle is the following: the main configuration option for it 
> > is BPF_SYSCALL. The BPF_EVENTS is an internal detail, always enabled when 
> > possible, and we make it so that if the BPF syscall is enabled, we'll enable 
> > the perf integration if all the must-have components are in place:
> 
> Makes sense, yes. I probably got confused due to the help text on the hidden 
> Kconfig entry, but that can nevertheless serve as documentation purpose.

Feel free to send a patch that adds a sentence to that help text that explains 
that this is an internal helper Kconfig entry that does not need to be 
interactively configurable.

Thanks,

	Ingo
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