FW: [Planetlab-devel] RE: pl/xen

[Marc E. Fiuczynski]

Hi David,

Good question.  It appears that the device mapper is compiled as a module.
Is it compiled as a built-in in your kernel?

Marc

-----Original Message-----
From: David Becker [mailto:becker at cs.duke.edu]
Sent: Wednesday, November 08, 2006 10:33 AM
To: Marc E. Fiuczynski
Subject: Re: [Planetlab-devel] RE: pl/xen



Hi Marc,


I tried your kernel and it failed to boot because of a device mapper
issue.  Did you include the device mapper in your kernel?  Does your
kernel expect a different initrd than what the bootmanager gets from PLC?

	Linux version 2.6.17-1.2187_FC5.0.planetlab.2006.11.07xenU
(support at planet-lab.org) (gcc version 3.3.3 20040412 (Red Hat Linux
3.3.3-7)) #1 SMP Tue Nov 7 02:18:09 EST 2006
	Creating block devices
	Making device-mapper control node
	Unable to find device-mapper major/minor
	Scanning logical volumes
	  Reading all physical volumes.  This may take a while...
	  Found volume group "planetlab" using metadata type lvm2
	Activating logical volumes
	  /dev/mapper/control: open failed: No such file or directory
	  Is device-mapper driver missing from kernel?
	  0 logical volume(s) in volume group "planetlab" now active
	Making device nodes
	  /dev/mapper/control: open failed: No such file or directory
	  Is device-mapper driver missing from kernel?
	ERROR: /bin/lvm exited abnormally!


When I substitute my kernel and using the initrd the bootmanager got
from PLC, the devmapper works fine:
	Creating block devices
	Making device-mapper control node
	Scanning logical volumes
	  Reading all physical volumes.  This may take a while...
	  Found volume group "planetlab" using metadata type lvm2
	Activating logical volumes
	  3 logical volume(s) in volume group "planetlab" now active
	Making device nodes
	Mounting root filesystem


David