4255107abbb7c08ab712434efc8
author Vivek Goyal <vgoyal@redhat.com> 1259863187 -0500
committer Jens Axboe <jens.axboe@oracle.com> 1259864932 +0100

blkio: Take care of cgroup deletion and cfq group reference counting

o One can choose to change elevator or delete a cgroup. Implement group
  reference counting so that both elevator exit and cgroup deletion can
  take place gracefully.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Nauman Rafique <nauman@google.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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