From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754752AbcHASOY (ORCPT ); Mon, 1 Aug 2016 14:14:24 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:37128 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754691AbcHASN7 (ORCPT ); Mon, 1 Aug 2016 14:13:59 -0400 Date: Mon, 1 Aug 2016 19:13:54 +0100 From: Al Viro To: Steven Rostedt Cc: robert.foss@collabora.com, mingo@redhat.com, scott@ubuntu.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PACTH v1] trace: Add trace events for open(), exec() and uselib() Message-ID: <20160801181354.GC2356@ZenIV.linux.org.uk> References: <1470072340-17748-1-git-send-email-robert.foss@collabora.com> <20160801134453.549968a6@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160801134453.549968a6@gandalf.local.home> User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 01, 2016 at 01:44:53PM -0400, Steven Rostedt wrote: > On Mon, 1 Aug 2016 13:25:40 -0400 > robert.foss@collabora.com wrote: > > > From: Scott James Remnant > > > > This patch uses TRACE_EVENT to add tracepoints for the open(), > > exec() and uselib() syscalls so that ureadahead can cheaply trace > > the boot sequence to determine what to read to speed up the next. > > > > Good luck. AFAIK, Viro refuses to have tracepoints in the vfs subsystem. Damn right. Somebody wants to use those as private debugging patches - sure, that's what the mechanism is good for. Just keep them in your test builds, where *you* will be responsible for keeping them working, etc.