From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([69.77.167.62] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1KodAM-0003Nu-9N for garchives@archives.gentoo.org; Sat, 11 Oct 2008 12:01:50 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id D8A29E05F5; Sat, 11 Oct 2008 12:01:49 +0000 (UTC) Received: from mail.osagesoftware.com (osagesoftware.com [216.144.204.42]) by pigeon.gentoo.org (Postfix) with ESMTP id 9322FE05F5 for ; Sat, 11 Oct 2008 12:01:49 +0000 (UTC) Received: from osage.osagesoftware.com (osage.osagesoftware.com [192.168.1.10]) by mail.osagesoftware.com (Postfix) with ESMTP id 175CD1D1F for ; Sat, 11 Oct 2008 08:01:48 -0400 (EDT) Date: Sat, 11 Oct 2008 08:01:47 -0400 From: David Relson To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Howto erase the "Insert root floppy and press enter" item before the kernel panic? Message-ID: <20081011080147.33a1916e@osage.osagesoftware.com> In-Reply-To: References: <20081010173408.c7cbe3a3.davidwei@newbread.tj.cn> <20081011113336.e42519a1.davidwei@newbread.tj.cn> Organization: Osage Software Systems, Inc. X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; x86_64-pc-linux-gnu) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Archives-Salt: 5354b913-d3ac-4d45-8a7d-439764b60712 X-Archives-Hash: af1aa80820fe3fa46c3bbddbab6f56a6 On Fri, 10 Oct 2008 23:06:09 -0400 Andrey Vul wrote: > On Fri, Oct 10, 2008 at 10:33 PM, David Wei > wrote: > > Sorry, I forgot that file . > > the .config is in the attachment this time. > > Thank you . > > > > On Fri, 10 Oct 2008 10:05:36 -0400 > > "Andrey Vul" wrote: > > > >> 2008/10/10 David Wei : > >> > Hi, > >> > I am trying kexec with "kernel panic reboot" cause i have to > >> > manage my server remotely. the "kernel panic > >> > reboot" (http://gentoo-wiki.com/TIP_Kernel_Panic_Reboot) has > >> > beening working so good so far for the regular kernel > >> > panic.However,sometimes when i were missed some file system > >> > items,the booking process would ask me: "VFS: Unable to mount > >> > root fs via NFS,trying floppy Insert root floppy and Press > >> > Enter." And the system hungup there waiting for my Enter. How > >> > can I remove this item from the booting process and panic > >> > directly so that it can reboot? Besides,I want to keep the NFS > >> > service. Thank you in advance. > >> I'm guessing that this is due to the floppy being compiled into the > >> emergency kernel. > >> In any case, can you post your .config for the emergency kernel? > >> > > Nothing in the .config looks suspicious. > It looks like it's inevitable that kernel patching will be needed, at > least, using the preprocessor to "hide" the floppy code. > Try this (it comments out floppy support which happens after NFS > support): comment_floppy.patch > --- init/do_mounts.c 2008-04-16 22:49:44.000000000 -0400 > +++ init/do_mounts2.c 2008-10-10 23:03:06.867876561 -0400 > @@ -308,7 +308,8 @@ > ROOT_DEV = Root_FD0; > } > #endif > -#ifdef CONFIG_BLK_DEV_FD > +/* #ifdef CONFIG_BLK_DEV_FD */ > +#if 0 > if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { > /* rd_doload is 2 for a dual initrd/ramload setup */ > if (rd_doload==2) { > > cd to your /usr/src/linux-... and run patch -p0 < comment_floppy.patch > It should fix the _specific_ issue. It might not fix the root cause, > however. > > -- > Andrey Vul Looking in do_mounts.c, the code that generates the message is: #ifdef CONFIG_ROOT_NFS if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) { if (mount_nfs_root()) return; printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n"); ROOT_DEV = Root_FD0; } #endif Looking at the .config file, I see "CONFIG_ROOT_NFS=y". Since the message is being printed, we know that if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) is true which wmeans that the if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) is false, i.e. the change to "#if 0" looks to be incorrect. Perhaps "CONFIG_ROOT_NFS=y" in .config is the root cause. I'd suggest changing the .config. HTH, David