Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756665AbZGHO5S (ORCPT ); Wed, 8 Jul 2009 10:57:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753956AbZGHO5D (ORCPT ); Wed, 8 Jul 2009 10:57:03 -0400 Received: from cantor2.suse.de ([195.135.220.15]:37831 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753576AbZGHO5C (ORCPT ); Wed, 8 Jul 2009 10:57:02 -0400 Date: Wed, 8 Jul 2009 07:56:25 -0700 From: Greg KH To: Peter Jones Cc: Dave Airlie , Jeff Chua , Linux Kernel , Linus Torvalds , Scott James Remnant , Kay Sievers , Dave Jones Subject: Re: can we move USB_DEVICEFS to non-embedded? Message-ID: <20090708145625.GA20690@suse.de> References: <20090623144221.GA29593@suse.de> <20090623153928.GA32604@suse.de> <21d7e9970907080354h6949b27va40fb830f612287@mail.gmail.com> <4A54A4A6.2060100@redhat.com> <4A54A538.3080407@redhat.com> <20090708140419.GA20418@suse.de> <4A54A938.5030807@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A54A938.5030807@redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1664 Lines: 49 On Wed, Jul 08, 2009 at 10:12:08AM -0400, Peter Jones wrote: > Greg KH wrote: > > On Wed, Jul 08, 2009 at 09:55:04AM -0400, Peter Jones wrote: > >> On 07/08/2009 09:52 AM, Peter Jones wrote: > >>> On 07/08/2009 06:54 AM, Dave Airlie wrote: > >>> > >>>> I'm not quite sure if something in the F11 initrd needs usbfs for > >>>> something (cc'ed Peter) > >>> Not a thing. > >> Actually, I take it back. We do mount usbfs, and we examine > >> /proc/bus/usb/devices as a heuristic to try and determine if > >> all the devices have been enumerated. > > > > How can you ever know if all devices are enumerated as you don't know > > how many devices will be showing up? > > You don't, that's why I said it's a heuristic. But basically, we have a > timeout, and if the device list doesn't change in that amount of time, we > call it done. > > It's not the best technique ever, but it does work. Works for what? Why would you want to delay your boot process like this? > >> So that could be related to what you're seeing. > > > > That file is now available in /sys/kernel/debug/usb/devices if you > > really need it. > > Oh, okay. I can change it to use that then. > > > But I would think that you do not. > > Well, we pretty much do until we switch to dracut. What is dracut and why would it change this? As no other distro does this kind of waiting, I'm a bit confused as to the need for it. thanks, greg k-h -- 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/