From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751274AbWBVTa3 (ORCPT ); Wed, 22 Feb 2006 14:30:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751415AbWBVTa2 (ORCPT ); Wed, 22 Feb 2006 14:30:28 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:2526 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751274AbWBVTa1 (ORCPT ); Wed, 22 Feb 2006 14:30:27 -0500 Subject: Re: 2.6.16-rc4: known regressions From: Arjan van de Ven To: Greg KH Cc: Gabor Gombas , "Theodore Ts'o" , Linus Torvalds , Andrew Morton , Kay Sievers , penberg@cs.helsinki.fi, bunk@stusta.de, rml@novell.com, linux-kernel@vger.kernel.org, johnstul@us.ibm.com In-Reply-To: <20060222191832.GA14638@suse.de> References: <20060221153305.5d0b123f.akpm@osdl.org> <20060222000429.GB12480@vrfy.org> <20060221162104.6b8c35b1.akpm@osdl.org> <20060222112158.GB26268@thunk.org> <20060222154820.GJ16648@ca-server1.us.oracle.com> <20060222162533.GA30316@thunk.org> <20060222173354.GJ14447@boogie.lpds.sztaki.hu> <20060222185923.GL16648@ca-server1.us.oracle.com> <20060222191832.GA14638@suse.de> Content-Type: text/plain Date: Wed, 22 Feb 2006 20:29:48 +0100 Message-Id: <1140636588.2979.66.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-02-22 at 11:18 -0800, Greg KH wrote: > On Wed, Feb 22, 2006 at 10:59:23AM -0800, Joel Becker wrote: > > On Wed, Feb 22, 2006 at 06:33:54PM +0100, Gabor Gombas wrote: > > > I don't think isnmod is broken. It's job is to load a chunk of code into > > > the kernel, and it's doing just that. > > > > > > ... > > > > > > But if your kernel has CONFIG_HOTPLUG enabled, then _you_ have asked for > > > this exact behavior, therefore you should better fix userspace to cope > > > with it. Your initrd should use the notification mechanisms provided by > > > the kernel to wait for the would-be root device really becoming > > > available; if it's not doing that, then IMHO you should not use a > > > CONFIG_HOTPLUG enabled kernel. > > > > The issue isn't so much "insmod is right" vs "insmod is wrong". > > It's that the behavior changed in a surprising fashion. Red Hat's > > kernel for RHEL4 (in our example) has CONFIG_HOTPLUG=y, yet it Just > > Works. A more recent kernel (.15 and .16 at least) with > > CONFIG_HOTPLUG=y doesn't work. Same disk drivers. Same initramfs > > script. > > RHEL is a very different kernel from mainline (just like SLES is). Have > you looked through their patches to see if they are including something > that causes this behavior? I doubt it does; rhel isn't that much patches... > > What about trying a stock 2.6.6 or so kernel? Does that work > differently from 2.6.15? ... however it's very much designed only for the kernel that comes with it (with "it's" I mean all the userspace infrastructure); all the changes and additions since 2.6.9 aren't incorporated so you probably really want new alsa, new initscripts, new mkinitrd, new module-init-tools. some because of abi changes since 2.6.9, others because the kernel grew capabilities that are really needed for "nice" behavior.