Tejun Heo 2a12f0dcda blk-throttle: make blk_throtl_drain() ready for hierarchy
The current blk_throtl_drain() assumes that all active throtl_grps are
queued on throtl_data->service_queue, which won't be true once
hierarchy support is implemented.

This patch makes blk_throtl_drain() perform post-order walk of the
blkg hierarchy draining each associated throtl_grp, which guarantees
that all bios will eventually be pushed to the top-level service_queue
in throtl_data.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
2013-05-14 13:52:37 -07:00
..
2013-03-23 14:15:29 -07:00
2012-01-11 16:29:31 +01:00
2013-03-23 14:15:29 -07:00
2013-02-22 10:42:45 +01:00