Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269198AbUI2XpP (ORCPT ); Wed, 29 Sep 2004 19:45:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269196AbUI2XpP (ORCPT ); Wed, 29 Sep 2004 19:45:15 -0400 Received: from fw.osdl.org ([65.172.181.6]:33935 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S269198AbUI2XpJ (ORCPT ); Wed, 29 Sep 2004 19:45:09 -0400 Date: Wed, 29 Sep 2004 16:38:28 -0700 From: "Randy.Dunlap" To: Greg KH Cc: patrakov@ums.usu.ru, linux-kernel@vger.kernel.org Subject: Re: udev is too slow creating devices Message-Id: <20040929163828.4d06010b.rddunlap@osdl.org> In-Reply-To: <20040919173035.GA2345@kroah.com> References: <414C9003.9070707@softhome.net> <1095568704.6545.17.camel@gaston> <414D42F6.5010609@softhome.net> <20040919140034.2257b342.Ballarin.Marc@gmx.de> <414D96EF.6030302@softhome.net> <20040919171456.0c749cf8.Ballarin.Marc@gmx.de> <20040919173035.GA2345@kroah.com> Organization: OSDL X-Mailer: Sylpheed version 0.9.12 (GTK+ 1.2.10; i386-vine-linux-gnu) X-Face: +5V?h'hZQPB9kW Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1476 Lines: 36 On Sun, 19 Sep 2004 10:30:35 -0700 Greg KH wrote: | On Sun, Sep 19, 2004 at 10:00:52PM +0600, Alexander E. Patrakov wrote: | > | > OK. The fact is that, when mounting the root filesystem, the kernel can | > (?) definitely say "there is no such device, and it's useless to wait | > for it--so I panic". Is it possible to duplicate this logic in the case | > with udev and modprobe? If so, it should be built into a common place | > (either the kernel or into modprobe), but not into all apps. | | No, we need to just change the kernel to sit and spin for a while if the | root partition is not found. This is the main problem right now for | booting off of a USB device (or any other "slow" to discover device.) | It's a known kernel issue, and there are patches for 2.4 for this, but | no one has taken the time to update them for 2.6. (I'm way behind, and I was hoping this thread would die, but:) I've seen 2.6 patches for booting from USB or IEEE1394. Is there a fair chance of getting something for USB/1394 booting merged? (other than by using initrd) I'd certainly like to see them merged. [snip] -- ~Randy MOTD: Always include version info. (Again. Sometimes I think ln -s /usr/src/linux/.config .signature) - 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/