From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2314 invoked by alias); 20 Jan 2009 01:33:20 -0000 Received: (qmail 2271 invoked by uid 22791); 20 Jan 2009 01:33:19 -0000 X-SWARE-Spam-Status: No, hits=-2.3 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from relay2.sgi.com (HELO relay.sgi.com) (192.48.179.30) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 20 Jan 2009 01:33:08 +0000 Received: from larry.melbourne.sgi.com (larry.melbourne.sgi.com [134.14.52.130]) by relay2.corp.sgi.com (Postfix) with SMTP id 81A1A30406E; Mon, 19 Jan 2009 17:33:02 -0800 (PST) Received: from chapter11.melbourne.sgi.com (chapter11.melbourne.sgi.com [134.14.54.96]) by larry.melbourne.sgi.com (950413.SGI.8.6.12/950213.SGI.AUTOCF) via ESMTP id MAA18865; Tue, 20 Jan 2009 12:32:58 +1100 Received: by chapter11.melbourne.sgi.com (Postfix, from userid 16345) id 3D83387304; Tue, 20 Jan 2009 12:32:58 +1100 (EST) Message-Id: <20090120012930.020621000@sgi.com> User-Agent: quilt/0.44-16.4 Date: Tue, 20 Jan 2009 01:33:00 -0000 From: Greg Banks To: Linux Kernel ML Cc: Linux NFS ML , Linux NFSv4 ML , SystemTAP ML Subject: [patch 0/5] activate & deactivate dprintks individually and severally Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2009-q1/txt/msg00183.txt.bz2 As mentioned in the recent discussion on NFS trace points on the NFS & SystemTap mailing lists. This patch allows field support staff and kernel developers debug kernel problems, by enabling them to treat dprintks as precise trace points rather than syslog spamming tools. This is a forward ported (from 2.6.16), updated, and split version of a patch that has been used in SGI's internal development tree for the last few months. The very first version of this was used about eighteen months ago when debugging NFS/RDMA, which has an enormous number of dprintks and no other way to debug it. Jason Baron suggested I post it here for review and contrast with his dynamic dprintk feature. -- Greg Banks, P.Engineer, SGI Australian Software Group. the brightly coloured sporks of revolution. I don't speak for SGI.