--- file.c.old	2004-08-02 09:25:15.000000000 +0800
+++ file.c	2004-08-02 15:56:43.000000000 +0800
@@ -1156,14 +1156,35 @@
 	down(&OCFS_I(inode)->ip_sem);
 	if (!(OCFS_I(inode)->ip_open_flags & OCFS_OIN_OPEN_FOR_DIRECTIO)) {
 		struct buffer_head **bhs = NULL;
+		struct buffer_head *bhz = NULL;
 		int i;
 		sector_t block;
 		u64 this_last;
 
 		up(&OCFS_I(inode)->ip_sem);
-
+		
 		LOG_TRACE_ARGS("zeroing %llu blocks from offset %llu\n", 
 			       num_blocks, block_off);
+
+		block = block_off;
+
+		if(!system_file) {
+			while (block < (block_off + num_blocks)) {
+				bhz = sb_getblk(osb->sb, block);
+				if (!bhz) {
+					status = -ENOMEM;
+					LOG_ERROR_STATUS(status);
+					break;
+				}
+				memset(bhz->b_data, 0, 
+				       osb->sb->s_blocksize);
+				mark_buffer_dirty(bhz);
+				brelse(bhz);
+				block++;
+			}
+			goto skip_zeros;
+		}
+
 		bhs = kmalloc(OCFS_MAX_ZERO_BLOCKS * sizeof(struct buffer_head *),
 			      GFP_KERNEL);
 		if (!bhs) {
@@ -1174,7 +1195,6 @@
 		memset(bhs, 0, OCFS_MAX_ZERO_BLOCKS * 
 		       sizeof(struct buffer_head *));
 
-		block = block_off;
 		while (block < (block_off + num_blocks)) {
 			this_last = block + OCFS_MAX_ZERO_BLOCKS;
 			if (this_last > (block_off + num_blocks))