From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752115Ab3LFBUc (ORCPT ); Thu, 5 Dec 2013 20:20:32 -0500 Received: from mga02.intel.com ([134.134.136.20]:40894 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751910Ab3LFBUa (ORCPT ); Thu, 5 Dec 2013 20:20:30 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,837,1378882800"; d="scan'208";a="447715108" From: Andi Kleen To: "H. Peter Anvin" Cc: Alexei Starovoitov , Ingo Molnar , Steven Rostedt , Peter Zijlstra , Thomas Gleixner , Masami Hiramatsu , Tom Zanussi , Jovi Zhangwei , Eric Dumazet , linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH tip 0/5] tracing filters with BPF References: <1386044930-15149-1-git-send-email-ast@plumgrid.com> <87fvq9cwlk.fsf@tassilo.jf.intel.com> <20131206001454.GB21717@two.firstfloor.org> <52A12421.2040208@zytor.com> Date: Thu, 05 Dec 2013 17:20:25 -0800 In-Reply-To: <52A12421.2040208@zytor.com> (H. Peter Anvin's message of "Thu, 05 Dec 2013 17:10:57 -0800") Message-ID: <871u1qwzae.fsf@tassilo.jf.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "H. Peter Anvin" 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@linux.intel.com -- Speaking for myself only