Hi,

On 01/14/11 03:42, Milan Broz wrote:

quoted

Milan, Jun, can you guys please verify this works correctly for the
multi holder dm case?  Thank you.

Hi,

unfortunately not. And the problem is much worse,
it breaks lvm resize operation completely.

For quick testing, try this:
("/dev/sdf" can be other block device.
 "testA" and "testB" can be other dm names which aren't used in
 your machine.)

# echo "0 10 linear /dev/sdf 0" | dmsetup create testA
# echo "0 10 linear /dev/sdf 10" | dmsetup create testB
(at this point, /dev/sdf has multiple holders)
# echo "0 20 linear /dev/sdf 10" | dmsetup load testB
(at this point, /dev/mapper/testB has 2 claims on /dev/sdf)
# dmsetup resume testB
(/dev/mapper/testB has 1 claim on /dev/sdf)
# dmsetup remove testA
# dmsetup remove testB


Thanks,
-- 
Jun'ichi Nomura, NEC Corporation