• Tejun Heo's avatar
    blk-throttle: implement proper hierarchy support · 9138125b
    Tejun Heo authored
    
    
    With the recent updates, blk-throttle is finally ready for proper
    hierarchy support.  Dispatching now honors service_queue->parent_sq
    and propagates correctly.  The only thing missing is setting
    ->parent_sq correctly so that throtl_grp hierarchy matches the cgroup
    hierarchy.
    
    This patch updates throtl_pd_init() such that service_queues form the
    same hierarchy as the cgroup hierarchy if sane_behavior is enabled.
    As this concludes proper hierarchy support for blkcg, the shameful
    .broken_hierarchy tag is removed from blkio_subsys.
    
    v2: Updated blkio-controller.txt as suggested by Vivek.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
    Cc: Li Zefan <lizefan@huawei.com>
    9138125b