linux-kernel - Re: Boot kernel panic after upgrade 3.0.1 -> 3.0.2

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Message-ID: <4E4BBFA2.8060008@gmail.com>
Date:	Wed, 17 Aug 2011 15:18:26 +0200
From:	Torquil Macdonald Sørensen 
	<torquil@...il.com>
To:	Paul Bolle <pebolle@...cali.nl>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Boot kernel panic after upgrade 3.0.1 -> 3.0.2

On 17/08/11 13:44, Paul Bolle wrote:
> On Wed, 2011-08-17 at 12:33 +0200, Torquil Macdonald Sørensen wrote:
>> At boot time, I get the following message on screen (copied by hand, but I'm
>> hoping there are not too many mistakes...):
>>
>> Kernel panic, not syncing: VFS Unable to mount root fs on unknown block(0,0)
>> Pid: 1. comm: swapper  Not tainted 3.0.2 #1
>> Call Trace:
>>    [<fffffff8127e4a9>] ? panic 0xa4 0x19b
>>    [<fffffff813f1e56>] ? mount_block_root+0x236/0x254
>>    [<fffffff81002930>] ? do_bounds+0x57/0x65
>>    [<fffffff813f1ff6>] ? prepare_namespace+0x133/0x169
>>    [<fffffff813f1b7c>] ? kernel_init+0x105/0x10a
>>    [<fffffff81284a94>] ? kernel_thread_helper+0x4/0x10
>>    [<fffffff813f1a77>] ? start_kernel+0x341/341
>>    [<fffffff81284a90>] ? gs_change+0xb/0xb
>
> I tend to see messages like that when I've messed up some basic setting
> needed to boot a kernel.
>
> My first suggestion would be to check your kernel command line. Does it
> have a "root=" parameter? Another thing I'd check is the initramfs. Does
> the bootloader pass the kernel an initramfs? Is the initramfs a valid
> initramfs? Does the (valid) initramfs have the stuff the kernel needs
> (block modules, fs modules). Stuff like that ...

You were right. I "forced" Debian to create an initrd for me, and update the 
grub configuration. Now I'm happily running 3.0.2. :-)

Thanks again!
Torquil Sørensen
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