linux-kernel - Re: [PATCH RFC net-next] tracing: accelerate tracing filters with BPF

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Message-ID: <CAMEtUuyHO-MGzL6nrLShG1UHTzb=HXTAPV5trv1SHL6TV0bMYw@mail.gmail.com>
Date:	Tue, 13 May 2014 20:26:10 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Network Development <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH RFC net-next] tracing: accelerate tracing filters with BPF

On Tue, May 13, 2014 at 8:07 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Tue, 13 May 2014 19:55:11 -0700
> Alexei Starovoitov <ast@...mgrid.com> wrote:
>
>> --- a/kernel/trace/Kconfig
>> +++ b/kernel/trace/Kconfig
>> @@ -79,6 +79,7 @@ config FTRACE_NMI_ENTER
>>         default y
>>
>>  config EVENT_TRACING
>> +     depends on NET
>>       select CONTEXT_SWITCH_TRACER
>>       bool
>>
>
> This part makes me a little nervous. I know a lot of embedded devices
> depend on tracing, but do they all have network?

I think we may want to split BPF into its own config, since it doesn't
really depend on anything in net.

> They may, but I would like to hear from others in the embedded space.
>
> -- Steve
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