linux-kernel - [PATCH v2 1/6] cgroups: Shrink struct cgroup

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Date:	Wed, 15 Dec 2010 17:35:01 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Paul Menage <menage@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Hiroyuki KAMEZAWA <kamezawa.hiroyu@...fujitsu.com>,
	Matt Helsley <matthltc@...ibm.com>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	containers@...ts.linux-foundation.org
Subject: [PATCH v2 1/6] cgroups: Shrink struct cgroup_subsys

On x86_32, sizeof(struct cgroup_subsys) shrinks from 276 bytes
to 264.

Acked-by: Paul Menage <menage@...gle.com>
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 include/linux/cgroup.h |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index ed4ba11..63d953d 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -481,14 +481,16 @@ struct cgroup_subsys {
 	void (*bind)(struct cgroup_subsys *ss, struct cgroup *root);
 
 	int subsys_id;
-	int active;
-	int disabled;
-	int early_init;
+
+	bool active:1;
+	bool disabled:1;
+	bool early_init:1;
 	/*
 	 * True if this subsys uses ID. ID is not available before cgroup_init()
 	 * (not available in early_init time.)
 	 */
-	bool use_id;
+	bool use_id:1;
+
 #define MAX_CGROUP_TYPE_NAMELEN 32
 	const char *name;
 
-- 
1.6.3
--
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