Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753856Ab3GXSxz (ORCPT ); Wed, 24 Jul 2013 14:53:55 -0400 Received: from smtpauth12.mfg.siteprotect.com ([64.26.60.150]:48995 "EHLO smtpauth02.mfg.siteprotect.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753538Ab3GXSxx (ORCPT ); Wed, 24 Jul 2013 14:53:53 -0400 Date: Wed, 24 Jul 2013 14:54:49 -0400 (EDT) From: Vince Weaver X-X-Sender: vince@pianoman.cluster.toy To: Sasha Levin cc: Andi Kleen , Andi Kleen , acme@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Stephane Eranian , torvalds@linux-foundation.org, trinity@vger.kernel.org Subject: Re: [PATCH 1/2] tools, perf: Add a precise event qualifier v2 In-Reply-To: <51EF222D.9070909@oracle.com> Message-ID: References: <1374501138-13496-1-git-send-email-andi@firstfloor.org> <20130723060108.GA18396@tassilo.jf.intel.com> <20130723225150.GT6123@two.firstfloor.org> <51EF222D.9070909@oracle.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-CTCH-Spam: Unknown X-CTCH-RefID: str=0001.0A020204.51F022C1.00E7,ss=1,re=0.000,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 966 Lines: 23 On Tue, 23 Jul 2013, Sasha Levin wrote: > It's probably fine to change a testing ABI once in a while, but when things > like trinity start breaking that often due to ABI changes in the same exact > place, that's too much IMO. The problem is they want the ABI to be "whatever our closely-coupled userspace perf tool accepts as input" which is an often-changing complicated (and undocumented) set of LEX and YACC parsers. I guess we could just give in and declare that to be the official perf sysfs interface in the ABI documentation. It's frustrating trying to maintain tools that use the perf_event interface because the inclusion of perf in the kernel is used as an excuse to constantly break the ABI. Vince -- 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/