tree a3b2fb05298ea41ecc0fd7ad56e1218369f7f9fd
parent f8d461d692c341add957fb973fb5ee1f62039dc7
author Vivek Goyal <vgoyal@redhat.com> 1259863193 -0500
committer Jens Axboe <jens.axboe@oracle.com> 1259864933 +0100

blkio: Wait for cfq queue to get backlogged if group is empty

o If a queue consumes its slice and then gets deleted from service tree, its
  associated group will also get deleted from service tree if this was the
  only queue in the group. That will make group loose its share.

o For the queues on which we have idling on and if these have used their
  slice, wait a bit for these queues to get backlogged again and then
  expire these queues so that group does not loose its share.

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