Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756668AbbBJFsF (ORCPT ); Tue, 10 Feb 2015 00:48:05 -0500 Received: from mail-qc0-f180.google.com ([209.85.216.180]:47172 "EHLO mail-qc0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755670AbbBJFsD (ORCPT ); Tue, 10 Feb 2015 00:48:03 -0500 MIME-Version: 1.0 In-Reply-To: References: <1423539961-21792-1-git-send-email-ast@plumgrid.com> <1423539961-21792-5-git-send-email-ast@plumgrid.com> <20150209230836.7f913c60@grimm.local.home> <20150210001608.157a9190@grimm.local.home> From: Alexei Starovoitov Date: Mon, 9 Feb 2015 21:47:42 -0800 Message-ID: Subject: Re: [PATCH v3 linux-trace 4/8] samples: bpf: simple tracing example in C To: Steven Rostedt Cc: Ingo Molnar , Namhyung Kim , Arnaldo Carvalho de Melo , Jiri Olsa , Masami Hiramatsu , Linux API , Network Development , LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1092 Lines: 24 On Mon, Feb 9, 2015 at 9:45 PM, Alexei Starovoitov wrote: > I thought we already stated that. > Here is the quote from perf_event.h: > * # The RAW record below is opaque data wrt the ABI > * # > * # That is, the ABI doesn't make any promises wrt to > * # the stability of its content, it may vary depending > * # on event, hardware, kernel version and phase of > * # the moon. > * # > * # In other words, PERF_SAMPLE_RAW contents are not an ABI. > > and this example is reading PERF_SAMPLE_RAW events and > uses locally defined structs to print them for simplicity. to underline my point once more: addition of bpf doesn't change at all what PERF_SAMPLE_RAW already delivers to user space. so no new ABIs anywhere. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/