Comment 9 for bug 1701545

Reviewed: https://review.openstack.org/480224
Committed: https://git.openstack.org/cgit/openstack/os-brick/commit/?id=925f435cb99fc24895c13d7cfce7074442772c62
Submitter: Jenkins
Branch: master

commit 925f435cb99fc24895c13d7cfce7074442772c62
Author: Thomas Bechtold <email address hidden>
Date: Tue Jul 4 15:10:22 2017 +0000

    Revert "Don't use ignoreskipactivation for thin LVM"

    Commit b82ab0d1a078d435bfe85c8aa9ed0805f26ca63a wrongly assumed that
    the "ignoreskipactivation" flag is not needed when using thin LVM
    provisioning. This is wrong.
    Using thin LVM leads now to an error when the content will be copied:

    ERROR cinder.volume.manager Command: sudo cinder-rootwrap /etc/cinder/
          rootwrap.conf dd if=/dev/mapper/cinder--volumes-_snapshot--UUID
          of=/dev/mapper/cinder--volumes-volume--UUID
          count=1073741824 bs=1M iflag=count_bytes conv=sparse

    The reason is that the the snapshot is not activated and due to that,
    no device node is available under /dev/mapper .

    This reverts commit b82ab0d1a078d435bfe85c8aa9ed0805f26ca63a and makes
    thin provisioning for LVM working again.

    Change-Id: I062fd7d7120081c79c714d8177104cdd95522d2d
    Depends-On: I788b297af92e11063b18c05a415b6f4d4d4bcd2c
    Closes-Bug: #1702322
    Related-Bug: #1701545