linux-kernel - Re: [RFC PATCH tip 0/5] tracing filters with BPF

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Date:	Thu, 05 Dec 2013 17:20:25 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Alexei Starovoitov <ast@...mgrid.com>,
	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Tom Zanussi <tom.zanussi@...ux.intel.com>,
	Jovi Zhangwei <jovi.zhangwei@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH tip 0/5] tracing filters with BPF

"H. Peter Anvin" <hpa@...or.com> writes:
>
> Not to mention that in that case we might as well -- since we need a
> compiler anyway -- generate the machine code in user space; the JIT
> solution really only is useful if it can provide something that we can't
> do otherwise, e.g. enable it in secure boot environments.

I can see there may be some setups which don't have a compiler
(e.g. I know some people don't use systemtap because of that)
But this needs a custom gcc install too as far as I understand.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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