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authorTejun Heo <tj@kernel.org>2013-05-15 00:52:38 +0400
committerTejun Heo <tj@kernel.org>2013-05-15 00:52:38 +0400
commit9138125beabbb76b4a373d4a619870f6f5d86fc5 (patch)
tree61ccabf042ff21b81c6dcd074ea8edeb77fedfa8 /block/blk-cgroup.c
parent693e751e70843c29884cde326016e746fa16073a (diff)
downloadlinux-9138125beabbb76b4a373d4a619870f6f5d86fc5.tar.xz
blk-throttle: implement proper hierarchy support
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: Tejun Heo <tj@kernel.org> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'block/blk-cgroup.c')
-rw-r--r--block/blk-cgroup.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index d0747605f56c..290792a13e3c 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -911,14 +911,6 @@ struct cgroup_subsys blkio_subsys = {
.subsys_id = blkio_subsys_id,
.base_cftypes = blkcg_files,
.module = THIS_MODULE,
-
- /*
- * blkio subsystem is utterly broken in terms of hierarchy support.
- * It treats all cgroups equally regardless of where they're
- * located in the hierarchy - all cgroups are treated as if they're
- * right below the root. Fix it and remove the following.
- */
- .broken_hierarchy = true,
};
EXPORT_SYMBOL_GPL(blkio_subsys);