Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756362AbYJIWz5 (ORCPT ); Thu, 9 Oct 2008 18:55:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750816AbYJIWzt (ORCPT ); Thu, 9 Oct 2008 18:55:49 -0400 Received: from colo.lackof.org ([198.49.126.79]:39149 "EHLO colo.lackof.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753152AbYJIWzs (ORCPT ); Thu, 9 Oct 2008 18:55:48 -0400 Date: Thu, 9 Oct 2008 16:55:33 -0600 From: Grant Grundler To: Yinghai Lu Cc: Matthew Wilcox , Grant Grundler , Jesse Barnes , Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: Re: [PATCH] pci: print out DMA mask info Message-ID: <20081009225533.GB1914@colo.lackof.org> References: <1223506943-6543-1-git-send-email-yinghai@kernel.org> <20081009211837.GC18444@colo.lackof.org> <48EE7745.2020603@kernel.org> <20081009213551.GC25780@parisc-linux.org> <86802c440810091451y4a3caceg1abaa75464c40a72@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86802c440810091451y4a3caceg1abaa75464c40a72@mail.gmail.com> X-Home-Page: http://www.parisc-linux.org/ User-Agent: Mutt/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1772 Lines: 44 On Thu, Oct 09, 2008 at 02:51:32PM -0700, Yinghai Lu wrote: > On Thu, Oct 9, 2008 at 2:35 PM, Matthew Wilcox wrote: > > Why's that interesting to the sysadmin of the machine? To the driver > > writer, certainly. But what's the use of it to the people using the > > machine? ... > make linux kernel act like black box as other os? I don't understand your reply. If someone thinks linux is a black box, printing this message won't help them. "To flag use of bounce buffer or other suboptimal behaviors" could be debated. Regarding associating the output with other PCI messages, I'd hope the fact that the /sys entry is in the same directory as other sys files would be enough clue to associate those together. e.g.: grundler <2068>cd /sys/bus/pci/devices/0000\:01\:00.0/ grundler <2069>ls broken_parity_status driver@ irq resource0 subsystem_device bus@ enable local_cpus resource1 subsystem_vendor class i2c-0/ modalias resource3 uevent config i2c-1/ power/ rom vendor device i2c-2/ resource subsystem@ means all those files refer to the same device. lspci is just a nice wrapper to format/dump that info and perhaps help people associate different bits of available info. hth, grant > > YH > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/