From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755578AbcHBI3r (ORCPT ); Tue, 2 Aug 2016 04:29:47 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:33578 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750963AbcHBI3g (ORCPT ); Tue, 2 Aug 2016 04:29:36 -0400 Date: Tue, 2 Aug 2016 10:11:46 +0200 From: Ingo Molnar To: Al Viro Cc: robert.foss@collabora.com, rostedt@goodmis.org, 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: <20160802081146.GA9601@gmail.com> References: <1470072340-17748-1-git-send-email-robert.foss@collabora.com> <20160801181014.GB2356@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160801181014.GB2356@ZenIV.linux.org.uk> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Al Viro wrote: > On Mon, Aug 01, 2016 at 01:25:40PM -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. > > NAK. No Tracepoints In VFS. Not going to happen - any tracepoint can all too > easily become a cast-in-stone userland ABI. And what's the problem with that? ABIs increase the utility of the kernel. Thanks, Ingo