From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751414AbWBVTSj (ORCPT ); Wed, 22 Feb 2006 14:18:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751420AbWBVTSj (ORCPT ); Wed, 22 Feb 2006 14:18:39 -0500 Received: from dsl093-040-174.pdx1.dsl.speakeasy.net ([66.93.40.174]:60809 "EHLO aria.kroah.org") by vger.kernel.org with ESMTP id S1751414AbWBVTSh (ORCPT ); Wed, 22 Feb 2006 14:18:37 -0500 Date: Wed, 22 Feb 2006 11:18:32 -0800 From: Greg KH To: 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 Subject: Re: 2.6.16-rc4: known regressions Message-ID: <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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060222185923.GL16648@ca-server1.us.oracle.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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? What about trying a stock 2.6.6 or so kernel? Does that work differently from 2.6.15? thanks, greg k-h