Commits on Jan 13, 2014

1. Discard all data on devicemapper devices when deleting them …

   This works around the fact that deleting a device in a thin pool
   doesn't discard the free space. Unfortunately even this is not perfect,
   as it seems discards are respected only for blocks that has never been
   shared in the thin device code. However, this has been fixed in the
   upstream kernel device-mapper tree:
   
   http://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-next&id=0ab1c92ff748b745c1ed7cde31bb37ad2c5f901a
   
   When this hits the kernel I belive this will fully return space
   for removed images/containers to the host FS. For now it only
   helps partially (which is better than nothing).
   
   Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)

   

   alexlarsson committed Jan 13, 2014
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