From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936850Ab0COVYY (ORCPT ); Mon, 15 Mar 2010 17:24:24 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:37977 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936780Ab0COVYX (ORCPT ); Mon, 15 Mar 2010 17:24:23 -0400 From: "Rafael J. Wysocki" To: Greg KH Subject: Re: [PATCH] Driver core: Reduce the level of request_firmware() messages Date: Mon, 15 Mar 2010 22:27:11 +0100 User-Agent: KMail/1.12.4 (Linux/2.6.34-rc1-rjw; KDE/4.3.5; x86_64; ; ) Cc: Jaswinder Singh Rajput , Greg KH , LKML , Andrew Morton , David Woodhouse References: <201002272143.22156.rjw@sisk.pl> <3f9a31f41002281213y2d65ae37xf9934a0775d8d9ee@mail.gmail.com> <20100315201659.GA6757@kroah.com> In-Reply-To: <20100315201659.GA6757@kroah.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201003152227.11295.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday 15 March 2010, Greg KH wrote: > On Mon, Mar 01, 2010 at 01:43:54AM +0530, Jaswinder Singh Rajput wrote: > > Hello Rafael, > > > > On Mon, Mar 1, 2010 at 1:24 AM, Rafael J. Wysocki wrote: > > > On Sunday 28 February 2010, Jaswinder Singh Rajput wrote: > > >> > > >> On Sun, 2010-02-28 at 13:13 +0100, Rafael J. Wysocki wrote: > > >> > On Sunday 28 February 2010, Jaswinder Singh Rajput wrote: > > >> > > On Sun, Feb 28, 2010 at 2:13 AM, Rafael J. Wysocki wrote: > > >> > > > From: Rafael J. Wysocki > > >> > > > > > >> > > > The messages from _request_firmware() informing that firmware is > > >> > > > being requested or built-in firmware is going to be used are printed > > >> > > > at KERN_INFO, which produces lots of noise on systems with huge > > >> > > > numbers of AMD CPUs. Reduce the level of these messages to > > >> > > > KERN_DEBUG to get rid of that noise. > > >> > > > > > >> > > > > >> > > Which firmware we are using is very useful information. Because of > > >> > > huge numbers of CPUs it seems noise then better provide the > > >> > > information for first cpu and for the rest of the CPUs you can show by > > >> > > KERN_DEBUG. > > >> > > > >> > That would have been better indeed, but the problem is _request_firmware() > > >> > doesn't allow us to change the level of its messages on demand. > > >> > > >> Can we try this : > > >> > > >> if (smp_processor_id()) > > >> dev_dbg(..); > > >> else > > >> dev_info(..); > > > > > > Well, it doesn't look particularly nice, does it? > > > > > > Besides, say we're requesting firmware for a non-CPU device which happens > > > to run on CPU1. Then, dev_dbg() will be used, which most likely is not what we > > > want. > > > > > > > Yes, you are right. But atleast can you try it once and show the > > output with and without this. > > Was there ever a resolution to this? Nope. > Rafael, do you want me to apply your original patch now? I still think it's a good idea. The information about what firmware is being used doesn't seem to be very useful for anything but debugging, so I think KERN_DEBUG is actually the right level for these messages. Rafael