The inode table has been zeroed in setup_new_group_blocks().
Mark it as such in ext4_group_add().

As a side note, online resize and inode zeroing are "dual".

In order to obtain a filesystem with faster formating times one can
do:
. either format a smaller fs and then resize it,
. or format the fs with lazy_itable_init

---
 fs/ext4/resize.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.28-rc4-itable_init/fs/ext4/resize.c
===================================================================
--- linux-2.6.28-rc4-itable_init.orig/fs/ext4/resize.c
+++ linux-2.6.28-rc4-itable_init/fs/ext4/resize.c
@@ -865,7 +865,7 @@ int ext4_group_add(struct super_block *s
 	gdp->bg_free_blocks_count = cpu_to_le16(input->free_blocks_count);
 	gdp->bg_free_inodes_count = cpu_to_le16(EXT4_INODES_PER_GROUP(sb));
 	gdp->bg_checksum = ext4_group_desc_csum(sbi, input->group, gdp);
-
+	gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_ZEROED);
 	/*
 	 * We can allocate memory for mb_alloc based on the new group
 	 * descriptor

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