Date:	Fri, 31 Aug 2007 18:41:25 -0700
From:	Christoph Lameter <clameter@....com>
To:	Andy Whitcroft <apw@...dowen.org>
Subject: [RFC 18/26] FS: ExtX filesystem defrag

Support defragmentation for extX filesystem inodes

Signed-off-by: Christoph Lameter <clameter@....com>
---
 fs/ext2/super.c |    9 +++++++++
 fs/ext3/super.c |    8 ++++++++
 fs/ext4/super.c |    8 ++++++++
 3 files changed, 25 insertions(+)

Index: linux-2.6/fs/ext2/super.c
===================================================================
--- linux-2.6.orig/fs/ext2/super.c	2007-08-28 19:48:06.000000000 -0700
+++ linux-2.6/fs/ext2/super.c	2007-08-28 20:16:05.000000000 -0700
@@ -168,6 +168,12 @@ static void init_once(void * foo, struct
 	inode_init_once(&ei->vfs_inode);
 }
 
+static void *ext2_get_inodes(struct kmem_cache *s, int nr, void **v)
+{
+	return fs_get_inodes(s, nr, v,
+		offsetof(struct ext2_inode_info, vfs_inode));
+}
+
 static int init_inodecache(void)
 {
 	ext2_inode_cachep = kmem_cache_create("ext2_inode_cache",
@@ -177,6 +183,9 @@ static int init_inodecache(void)
 					     init_once);
 	if (ext2_inode_cachep == NULL)
 		return -ENOMEM;
+
+	kmem_cache_setup_defrag(ext2_inode_cachep,
+			ext2_get_inodes, kick_inodes);
 	return 0;
 }
 
Index: linux-2.6/fs/ext3/super.c
===================================================================
--- linux-2.6.orig/fs/ext3/super.c	2007-08-28 19:48:06.000000000 -0700
+++ linux-2.6/fs/ext3/super.c	2007-08-28 20:16:05.000000000 -0700
@@ -484,6 +484,12 @@ static void init_once(void * foo, struct
 	inode_init_once(&ei->vfs_inode);
 }
 
+static void *ext3_get_inodes(struct kmem_cache *s, int nr, void **v)
+{
+	return fs_get_inodes(s, nr, v,
+		offsetof(struct ext3_inode_info, vfs_inode));
+}
+
 static int init_inodecache(void)
 {
 	ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
@@ -493,6 +499,8 @@ static int init_inodecache(void)
 					     init_once);
 	if (ext3_inode_cachep == NULL)
 		return -ENOMEM;
+	kmem_cache_setup_defrag(ext3_inode_cachep,
+			ext3_get_inodes, kick_inodes);
 	return 0;
 }
 
Index: linux-2.6/fs/ext4/super.c
===================================================================
--- linux-2.6.orig/fs/ext4/super.c	2007-08-28 19:48:06.000000000 -0700
+++ linux-2.6/fs/ext4/super.c	2007-08-28 20:16:05.000000000 -0700
@@ -535,6 +535,12 @@ static void init_once(void * foo, struct
 	inode_init_once(&ei->vfs_inode);
 }
 
+static void *ext4_get_inodes(struct kmem_cache *s, int nr, void **v)
+{
+	return fs_get_inodes(s, nr, v,
+		offsetof(struct ext4_inode_info, vfs_inode));
+}
+
 static int init_inodecache(void)
 {
 	ext4_inode_cachep = kmem_cache_create("ext4_inode_cache",
@@ -544,6 +550,8 @@ static int init_inodecache(void)
 					     init_once);
 	if (ext4_inode_cachep == NULL)
 		return -ENOMEM;
+	kmem_cache_setup_defrag(ext4_inode_cachep,
+			ext4_get_inodes, kick_inodes);
 	return 0;
 }
 

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