From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763399AbZD1R0o (ORCPT ); Tue, 28 Apr 2009 13:26:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761536AbZD1R0L (ORCPT ); Tue, 28 Apr 2009 13:26:11 -0400 Received: from mx2.redhat.com ([66.187.237.31]:60980 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761302AbZD1R0J (ORCPT ); Tue, 28 Apr 2009 13:26:09 -0400 To: Andrew Morton Cc: Zhaolei , mingo@elte.hu, kosaki.motohiro@jp.fujitsu.com, fweisbec@gmail.com, rostedt@goodmis.org, tzanussi@gmail.com, linux-kernel@vger.kernel.org, oleg@redhat.com Subject: Re: [PATCH 0/4] workqueue_tracepoint: Add worklet tracepoints for worklet lifecycle tracing References: <20090415085310.AC0D.A69D9226@jp.fujitsu.com> <20090415011533.GI5968@nowhere> <20090415141250.AC46.A69D9226@jp.fujitsu.com> <49E8282A.6010004@cn.fujitsu.com> <49E82CA7.2040606@cn.fujitsu.com> <20090417134557.GA23493@elte.hu> <49F1A59B.3080206@cn.fujitsu.com> <20090424130616.a3c217cb.akpm@linux-foundation.org> From: fche@redhat.com (Frank Ch. Eigler) Date: Tue, 28 Apr 2009 13:24:57 -0400 In-Reply-To: <20090424130616.a3c217cb.akpm@linux-foundation.org> (Andrew Morton's message of "Fri, 24 Apr 2009 13:06:16 -0700") Message-ID: User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton writes: > [...] The patches introduce a moderate amount of tracing-specific > hooks into the core workqueue code, which inevitably increases the > maintenance load for that code. It is important that it be > demonstrated that the benefts of the code are worth that cost. > Hence it is important that these benefits be demonstrated to us, by > yourself. Please. [...] To be fair, if you ask for someone to specify and quantify the "benefits" side of this, shouldn't someone specify and quantify the "cost" side of this too? That way we would have something to compare. - FChE