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Message-ID: <CAMEtUuzey7PanznrAguOpvPLxyhgJB++ovE8RNys7srs=EY1qg@mail.gmail.com>
Date:	Fri, 15 Aug 2014 10:36:17 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Brendan Gregg <brendan.d.gregg@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Daniel Borkmann <dborkman@...hat.com>,
	Chema Gonzalez <chema@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Linux API <linux-api@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v4 net-next 17/26] tracing: allow eBPF programs to be
 attached to events

On Fri, Aug 15, 2014 at 10:20 AM, Andy Lutomirski <luto@...capital.net> wrote:
> The downside of this approach is that compat support might be
> difficult or impossible.

Would do you mean by compat? 32-bit programs on 64-bit kernels?
There is no such concept for eBPF. All eBPF programs are always
operating on 64-bit registers.
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