From 2868ef7b39490e6b41c2c61cd9a5cd891e778b54 Mon Sep 17 00:00:00 2001
From: Vivek Goyal <vgoyal@redhat.com>
Date: Thu, 3 Dec 2009 12:59:48 -0500
Subject: blkio: Some debugging aids for CFQ

o Some debugging aids for CFQ.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
 block/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'block/Kconfig')

diff --git a/block/Kconfig b/block/Kconfig
index 6ba1a8e3388b..e20fbde0875c 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -90,6 +90,15 @@ config BLK_CGROUP
 	control disk bandwidth allocation (proportional time slice allocation)
 	to such task groups.
 
+config DEBUG_BLK_CGROUP
+	bool
+	depends on BLK_CGROUP
+	default n
+	---help---
+	Enable some debugging help. Currently it stores the cgroup path
+	in the blk group which can be used by cfq for tracing various
+	group related activity.
+
 endif # BLOCK
 
 config BLOCK_COMPAT
-- 
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