Filesystem: Ext2 filesystem defrag

[Christoph Lameter <cl@linux-foundation.org>]

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Support defragmentation for ext2 filesystem inodes

Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>

---
 fs/ext2/super.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: slab-2.6/fs/ext2/super.c
===================================================================
--- slab-2.6.orig/fs/ext2/super.c	2010-01-22 15:09:43.000000000 -0600
+++ slab-2.6/fs/ext2/super.c	2010-01-22 16:20:46.000000000 -0600
@@ -174,6 +174,12 @@ static void init_once(void *foo)
 	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",
@@ -183,6 +189,9 @@ 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;
 }
 

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