reiserfs: inode defragmentation support

Add inode defrag support

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 fs/reiserfs/super.c |   21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

Index: slub/fs/reiserfs/super.c
===================================================================
--- slub.orig/fs/reiserfs/super.c	2007-05-19 19:28:48.000000000 -0700
+++ slub/fs/reiserfs/super.c	2007-05-19 19:53:39.000000000 -0700
@@ -520,6 +520,17 @@ static void init_once(void *foo, struct 
 #endif
 }
 
+static void *reiserfs_get_inodes(struct kmem_cache *s, int nr, void **v)
+{
+	return fs_get_inodes(s, nr, v,
+			offsetof(struct reiserfs_inode_info, vfs_inode));
+}
+
+struct kmem_cache_ops reiserfs_kmem_cache_ops = {
+	.get = reiserfs_get_inodes,
+	.kick = kick_inodes
+};
+
 static int init_inodecache(void)
 {
 	reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
@@ -527,7 +538,8 @@ static int init_inodecache(void)
 							 reiserfs_inode_info),
 						  0, (SLAB_RECLAIM_ACCOUNT|
 							SLAB_MEM_SPREAD),
-						  init_once, NULL);
+						  init_once,
+						  &reiserfs_kmem_cache_ops);
 	if (reiserfs_inode_cachep == NULL)
 		return -ENOMEM;
 	return 0;
@@ -591,6 +603,12 @@ static ssize_t reiserfs_quota_read(struc
 				   loff_t);
 #endif
 
+static void reiserfs_shrink_inodes(int nr_freed)
+{
+	if (nr_freed > 100)
+		kmem_cache_shrink(reiserfs_inode_cachep);
+}
+
 static const struct super_operations reiserfs_sops = {
 	.alloc_inode = reiserfs_alloc_inode,
 	.destroy_inode = reiserfs_destroy_inode,
@@ -598,6 +616,7 @@ static const struct super_operations rei
 	.dirty_inode = reiserfs_dirty_inode,
 	.delete_inode = reiserfs_delete_inode,
 	.clear_inode = reiserfs_clear_inode,
+	.shrink_inodes = reiserfs_shrink_inodes,
 	.put_super = reiserfs_put_super,
 	.write_super = reiserfs_write_super,
 	.sync_fs = reiserfs_sync_fs,