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

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Message-ID: <20140514050958.GB9448@gmail.com>
Date:	Wed, 14 May 2014 07:09:58 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	Steven Rostedt <rostedt@...dmis.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>
Subject: Re: [PATCH RFC net-next] tracing: accelerate tracing filters with BPF


* Alexei Starovoitov <ast@...mgrid.com> wrote:

> On Tue, May 13, 2014 at 8:17 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> > On Tue, 13 May 2014 19:55:11 -0700
> > Alexei Starovoitov <ast@...mgrid.com> wrote:
> >
> >> Tracing filters are parsing user supplied character string and constructing
> >> a predicate tree. filter_match_preds() was used to walk nodes of the tree to
> >> simulate matching of boolean expression.
> >>
> >
> > I applied this on top of net-next, from:
> >
> >  git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
> >  (master branch)
> >
> > and got this compile error:
> 
> Sorry I wasn't clear in the log.
> This patch depends on JIT patches that were posted separately.
> Since this one is RFC, I didn't want to mix them.
> JIT patches:
> http://patchwork.ozlabs.org/patch/348558/
> http://patchwork.ozlabs.org/patch/348559/
> http://patchwork.ozlabs.org/patch/348560/

Might make sense for you to get a korg account and stick such bits 
into Git trees, to ease testing.

Thanks,

	Ingo
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