From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 17 Nov 2009 18:39:48 +0100 (CET) Received: from out4.smtp.messagingengine.com ([66.111.4.28]:54790 "EHLO out4.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by ftp.linux-mips.org with ESMTP id S1493878AbZKQRjl (ORCPT ); Tue, 17 Nov 2009 18:39:41 +0100 Received: from compute1.internal (compute1.internal [10.202.2.41]) by gateway1.messagingengine.com (Postfix) with ESMTP id B058EBFA2A; Tue, 17 Nov 2009 12:39:40 -0500 (EST) Received: from web8.messagingengine.com ([10.202.2.217]) by compute1.internal (MEProxy); Tue, 17 Nov 2009 12:39:40 -0500 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=messagingengine.com; h=message-id:from:to:cc:mime-version:content-transfer-encoding:content-type:references:subject:in-reply-to:date; s=smtpout; bh=Xfj1+5aauSfDdXkATqYvF1BWN3Y=; b=EkEcgueAE9XJI/+ps4us9fT3g4rzaV1GbmBDNJ/dtd40KsM40NmvDRHDrKoKc1FY4RzBGqqqM3C/vm/n5V1sqzj4Q+iA8GYxJBrELU3ChZ5R369sjMDWaN9BSv9VJs92lGksomv4mXMQa3PkRMMuzC6CGiIiWPmbUOxPQ3z28Lc= Received: by web8.messagingengine.com (Postfix, from userid 99) id 8C9F912AD02; Tue, 17 Nov 2009 12:39:40 -0500 (EST) Message-Id: <1258479580.17116.1345691629@webmail.messagingengine.com> X-Sasl-Enc: efqfsLJG5YQVWpR1ulRQ3cKyHGHw35CkUKL7pHS44Cci 1258479580 From: myuboot@fastmail.fm To: "Ralf Baechle" Cc: linux-kernel@vger.kernel.org, "linux-mips" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" X-Mailer: MessagingEngine.com Webmail Interface References: <1255735395.30097.1340523469@webmail.messagingengine.com> <4AD906D8.3020404@caviumnetworks.com> <1257898975.30125.1344591929@webmail.messagingengine.com> <4AFA6B7F.10404@walsimou.com> <1258417281.1921.1345554581@webmail.messagingengine.com> <20091117093330.GA24000@linux-mips.org> Subject: Re: problem bring up initramfs and busybox In-Reply-To: <20091117093330.GA24000@linux-mips.org> Date: Tue, 17 Nov 2009 11:39:40 -0600 Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 24950 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: myuboot@fastmail.fm Precedence: bulk X-list: linux-mips On Tue, 17 Nov 2009 10:33 +0100, "Ralf Baechle" wrote: > On Mon, Nov 16, 2009 at 06:21:21PM -0600, myuboot@fastmail.fm wrote: > > > I have been struggling to bring up a MIPS 32 board with busybox with or > > without initramfs. > > The kernel stucks there without the shell coming up. > > > > [ 1.153000] nf_conntrack version 0.5.0 (1024 buckets, 4096 max) > > [ 1.161000] ip_tables: (C) 2000-2006 Netfilter Core Team > > [ 1.167000] TCP cubic registered > > [ 1.170000] NET: Registered protocol family 17 > > [ 25.971000] Freeing unused kernel memory: 1032k freed > > [ 39.969000] Algorithmics/MIPS FPU Emulator v1.5 > > > > > > What I tried here is to use initramfs with statically linked busybox. > > The initramfs seems to be up, and runs the commands in the /init one by > > one, and then it goes to a inifite loop in r4k_wait at > > arch/mips/kernel/genex.S. > > r4k_wait is called by the idle loop. Which means the kernel has no > process > to run so runs the idle loop. This might be because there is no other > process left running or because all processes are waiting for I/O for > example. So it's not uncommon that even busy systems ocasionally briefly > run the idle loop. In other words, seeing the processor executing > r4k_wait does not necessarily mean something went wrong. In this case - > also along with the other information you've provieded it's not obvious > what has gone wrong. > > Ralf According to an email from Kevin, I added a symbolic link from switch_root to busybox. The switch_root seems to be found now based on the execution sequence, but I got the following error - "Kernel panic - not syncing: Attempted to kill init!". This is the same error when I tried to start the shell without initramfs. Something must be wrong, but I can't quite figure out. [ 9.250000] Freeing unused kernel memory: 1032k freed [ 10.463000] Algorithmics/MIPS FPU Emulator v1.5 [ 41.695000] Kernel panic - not syncing: Attempted to kill init! [ 41.701000] Rebooting in 3 seconds. Thanks for your help. Andrew (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/init", argv=0x943dd2bc, envp=0x943dd230, regs=0x97819e30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/sbin/switch_root", argv=0x4f7450, envp=0x4f7464, regs=0x97819f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing.