Snapshot feature problems with kernel 2.6.21.6

I've recently had to manually update my host kernel on a Debian testing
system to 2.6.21.6. However, with the upgrade from 2.6.16.27 the
snapshot feature with the stock Debian version of evms (2.5.5) isn't
working properly:

1. I create a snapshot.
2. I create the volume.
3. I successfully backup the data from the first volume.
4. I delete the volume
5. I attempt to delete the snapshot (fails).

However, I can't delete it (it returns a "Device or resource busy").
Here are the package Debian packages I'm using:

ii  evms                             2.5.5-22
ii  evms-cli                         2.5.5-22
ii  evms-gui                         2.5.5-22
ii  evms-ncurses                     2.5.5-22
ii  libevms-2.5                      2.5.5-22

I see the following in the log:

Jul 23 10:57:10 vs2.sterlingcgi.com _2_ BBR: BBR_InitTask:
context->action is unknown or unsupported
Jul 23 10:57:10 vs2.sterlingcgi.com _3_ Engine: evms_create_task: Error
initializing options.
Jul 23 10:57:10 vs2.sterlingcgi.com _3_ Engine: evms_create_task: Error
initializing options.
Jul 23 10:57:10 vs2.sterlingcgi.com _2_ Engine: get_parent_plugin:
Object snap1_auth_root does not have any parent objects.
Jul 23 10:57:18 vs2.sterlingcgi.com _2_ Engine: run_command_v4: Error
returned from ioctl call: 16: Device or resource busy.
Jul 23 10:57:18 vs2.sterlingcgi.com _1_ Engine: deactivate_volume:
Failed to deactivate volume /dev/evms/scg-auth-2_root.  Error code is
16: Device or resource busy


A copy of the full debug log can be viewed here:

http://www.coherenthosting.com/prj/uml/miscellaneous/evms-engine-log.txt

A copy filtered for the few seconds of activity surrounding when the
error message appeared on screen is here:

http://www.coherenthosting.com/prj/uml/miscellaneous/evms_snip.txt

Also, I tried the following:

# evms_gather_info
Command set failed with error code 255
#

The log for the failed "evms_gather_info" command can be view at:

http://www.coherenthosting.com/prj/uml/miscellaneous/evms_gather_info-lo
g.txt

Finally, the configuration file for the 2.6.21.6 kernel can be found
here:

http://www.coherenthosting.com/prj/uml/miscellaneous/2.6.21.6-config.txt

Ideas?

Tony

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