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

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Date:	Sat, 03 Oct 2015 09:42:51 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Ingo Molnar <mingo@...nel.org>
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

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.

Thanks,
Daniel
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