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Re: Booting top-of-tree bcm47xx as nfs-root with cfe only (no sibyl)

To: Mark E Mason <mason@broadcom.com>
Subject: Re: Booting top-of-tree bcm47xx as nfs-root with cfe only (no sibyl)
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Wed, 26 Nov 2008 23:10:54 +0000 (GMT)
Cc: LMO <linux-mips@linux-mips.org>, "mmason@upwardaccess.com" <mmason@upwardaccess.com>
In-reply-to: <BD3F7F1EFBA6D54DB056C4FFA45140080348EC801C@SJEXCHCCR01.corp.ad.broadcom.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <BD3F7F1EFBA6D54DB056C4FFA45140080348EC801C@SJEXCHCCR01.corp.ad.broadcom.com>
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On Wed, 26 Nov 2008, Mark E Mason wrote:

> Linux version 2.6.28-rc6 (mason@hawaii) (gcc version 3.4.4) #4 Wed Nov 26 
> 13:59:54 PST 2008
> arcs_cmdline='root=/dev/nfs rw nfsroot=10.0.1.184:/home/mason/debian-root-el 
> console=ttyS0,115200'<6>console [early0] enabled
[...]
> VFS: Cannot open root device "nfs" or unknown-block(0,255)
> Please append a correct "root=" boot option; here are the available 
> partitions:
> Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unknown-block(0,255)

 For NFS root to work you have to specify an "ip=" option too, so that a 
network interface gets assigned an address somehow.  The default for this 
option was changed to "off" at some point with no respective update to 
documentation apparently.

  Maciej

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