linux-kernel - [PATCH 5/5] bio-cgroup: Add a cgroup support to dm-ioband

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Message-Id: <20090416.213156.112612071.ryov@valinux.co.jp>
Date:	Thu, 16 Apr 2009 21:31:56 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xensource.com
Subject: [PATCH 5/5] bio-cgroup: Add a cgroup support to dm-ioband

With this patch, dm-ioband can work with the bio cgroup.

Based on 2.6.30-rc1
Signed-off-by: Hirokazu Takahashi <taka@...inux.co.jp>
Signed-off-by: Ryo Tsuruta <ryov@...inux.co.jp>

---
 drivers/md/dm-ioband-type.c |   10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

Index: linux-2.6.30-rc1/drivers/md/dm-ioband-type.c
===================================================================
--- linux-2.6.30-rc1.orig/drivers/md/dm-ioband-type.c
+++ linux-2.6.30-rc1/drivers/md/dm-ioband-type.c
@@ -6,6 +6,7 @@
  * This file is released under the GPL.
  */
 #include <linux/bio.h>
+#include <linux/biotrack.h>
 #include "dm.h"
 #include "dm-bio-list.h"
 #include "dm-ioband.h"
@@ -53,14 +54,7 @@ static int ioband_node(struct bio *bio)
 
 static int ioband_cgroup(struct bio *bio)
 {
-	/*
-	 * This function should return the ID of the cgroup which
-	 * issued "bio". The ID of the cgroup which the current
-	 * process belongs to won't be suitable ID for this purpose,
-	 * since some BIOs will be handled by kernel threads like aio
-	 * or pdflush on behalf of the process requesting the BIOs.
-	 */
-	return 0;	/* not implemented yet */
+	return get_bio_cgroup_id(bio);
 }
 
 struct group_type dm_ioband_group_type[] = {
--
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