linux-kernel - [-mm][PATCH 2/4] Enhance cgroup mm_owner_changed callback to add task information

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Message-Id: <20080503213804.3140.26503.sendpatchset@localhost.localdomain>
Date:	Sun, 04 May 2008 03:08:04 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	linux-mm@...ck.org
Cc:	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Paul Menage <menage@...gle.com>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, David Rientjes <rientjes@...gle.com>,
	Pavel Emelianov <xemul@...nvz.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [-mm][PATCH 2/4] Enhance cgroup mm_owner_changed callback to add task information



This patch adds an additional field to the mm_owner callbacks. This field
is required to get to the mm that changed.

Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
---

 include/linux/cgroup.h |    3 ++-
 kernel/cgroup.c        |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff -puN kernel/cgroup.c~cgroup-add-task-to-mm--owner-callbacks kernel/cgroup.c
--- linux-2.6.25/kernel/cgroup.c~cgroup-add-task-to-mm--owner-callbacks	2008-05-04 02:53:05.000000000 +0530
+++ linux-2.6.25-balbir/kernel/cgroup.c	2008-05-04 02:53:05.000000000 +0530
@@ -2772,7 +2772,7 @@ void cgroup_mm_owner_callbacks(struct ta
 			if (oldcgrp == newcgrp)
 				continue;
 			if (ss->mm_owner_changed)
-				ss->mm_owner_changed(ss, oldcgrp, newcgrp);
+				ss->mm_owner_changed(ss, oldcgrp, newcgrp, new);
 		}
 	}
 }
diff -puN include/linux/cgroup.h~cgroup-add-task-to-mm--owner-callbacks include/linux/cgroup.h
--- linux-2.6.25/include/linux/cgroup.h~cgroup-add-task-to-mm--owner-callbacks	2008-05-04 02:53:05.000000000 +0530
+++ linux-2.6.25-balbir/include/linux/cgroup.h	2008-05-04 02:53:05.000000000 +0530
@@ -310,7 +310,8 @@ struct cgroup_subsys {
 	 */
 	void (*mm_owner_changed)(struct cgroup_subsys *ss,
 					struct cgroup *old,
-					struct cgroup *new);
+					struct cgroup *new,
+					struct task_struct *p);
 	int subsys_id;
 	int active;
 	int disabled;
_

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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