linux-kernel - [RFC] [PATCH 7/8] cfq-iosched: Enable deep hierarchy in CGgroup

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Message-ID: <4CE086A9.8060306@cn.fujitsu.com>
Date:	Mon, 15 Nov 2010 09:02:33 +0800
From:	Gui Jianfeng <guijianfeng@...fujitsu.com>
To:	Vivek Goyal <vgoyal@...hat.com>, Jens Axboe <axboe@...nel.dk>
CC:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Corrado Zoccolo <czoccolo@...il.com>,
	Chad Talbott <ctalbott@...gle.com>,
	Nauman Rafique <nauman@...gle.com>,
	Divyesh Shah <dpshah@...gle.com>,
	Gui Jianfeng <guijianfeng@...fujitsu.com>
Subject: [RFC] [PATCH 7/8] cfq-iosched: Enable deep hierarchy in CGgroup

Currenlty, only level 0 and 1 CGroup directory is allowed to be created.
This patch enables deep hierarchy in CGgroup.

Signed-off-by: Gui Jianfeng <guijianfeng@...fujitsu.com>
Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
---
 block/blk-cgroup.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index b1febd0..455768a 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1452,10 +1452,6 @@ blkiocg_create(struct cgroup_subsys *subsys, struct cgroup *cgroup)
 		goto done;
 	}
 
-	/* Currently we do not support hierarchy deeper than two level (0,1) */
-	if (parent != cgroup->top_cgroup)
-		return ERR_PTR(-EPERM);
-
 	blkcg = kzalloc(sizeof(*blkcg), GFP_KERNEL);
 	if (!blkcg)
 		return ERR_PTR(-ENOMEM);
-- 
1.6.5.2
--
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