diff -Nru mysql-5.1.35/sql/hostname.cc mysql-5.1.35-known-hosts/sql/hostname.cc
--- mysql-5.1.35/sql/hostname.cc	2009-05-14 20:34:57.000000000 +0900
+++ mysql-5.1.35-known-hosts/sql/hostname.cc	2009-06-30 22:03:15.000000000 +0900
@@ -276,3 +276,44 @@
   add_wrong_ip(in);
   DBUG_RETURN(0);
 }
+
+bool fill_hostname_entries(THD* thd, TABLE *table)
+{
+  DBUG_ENTER("show_hostname_cache");
+  if (hostname_cache == NULL)
+    goto err;
+
+  CHARSET_INFO *cs= system_charset_info;
+  VOID(pthread_mutex_lock(&hostname_cache->lock));
+  HASH *hash = &hostname_cache->cache;
+  uint idx, total = hash->records;
+  for (idx= 0; idx < total; idx++)
+  {
+    host_entry *ent= (class host_entry *) hash_element(hash, idx);
+    if(!ent) continue;
+    
+    restore_record(table, s->default_values);
+
+    struct in_addr addr;
+    char in_str[40];
+    bzero(in_str, sizeof(in_str));
+    bcopy(ent->ip, &addr, sizeof(addr));
+    my_inet_ntoa(addr, in_str);
+    table->field[0]->store(in_str, strlen(in_str), cs);
+    if(ent->hostname == NULL)
+      table->field[1]->set_null();
+    else {
+      table->field[1]->set_notnull();
+      table->field[1]->store(ent->hostname, strlen(ent->hostname), cs);
+    }
+    table->field[2]->store(ent->errors, TRUE);
+    if(schema_table_store_record(thd, table)) goto err;
+  } 
+
+  VOID(pthread_mutex_unlock(&hostname_cache->lock));
+  DBUG_RETURN(FALSE);
+err:
+  VOID(pthread_mutex_unlock(&hostname_cache->lock));
+  DBUG_RETURN(TRUE);
+}
+
diff -Nru mysql-5.1.35/sql/mysql_priv.h mysql-5.1.35-known-hosts/sql/mysql_priv.h
--- mysql-5.1.35/sql/mysql_priv.h	2009-05-14 20:34:58.000000000 +0900
+++ mysql-5.1.35-known-hosts/sql/mysql_priv.h	2009-06-30 22:03:15.000000000 +0900
@@ -2283,6 +2283,7 @@
 bool hostname_cache_init();
 void hostname_cache_free();
 void hostname_cache_refresh(void);
+bool fill_hostname_entries(THD* thd, TABLE *table);
 
 /* sql_cache.cc */
 extern bool sql_cache_init();
diff -Nru mysql-5.1.35/sql/sql_show.cc mysql-5.1.35-known-hosts/sql/sql_show.cc
--- mysql-5.1.35/sql/sql_show.cc	2009-05-14 20:35:04.000000000 +0900
+++ mysql-5.1.35-known-hosts/sql/sql_show.cc	2009-06-30 22:03:15.000000000 +0900
@@ -203,6 +203,22 @@
   DBUG_RETURN(0);
 }
 
+/***************************************************************************
+** List all entries in host cache
+***************************************************************************/
+
+int fill_cached_hosts(THD *thd, TABLE_LIST *tables, COND *cond)
+{
+  DBUG_ENTER("fill_cached_hosts");
+  TABLE *table= tables->table;
+
+  if (fill_hostname_entries(thd, table))
+    DBUG_RETURN(1);
+
+  DBUG_RETURN(0);
+}
+
+
 
 /***************************************************************************
 ** List all Authors.
@@ -6672,6 +6688,14 @@
   {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
 };
 
+ST_FIELD_INFO host_cache_fields_info[]=
+{
+  {"IP_ADDRESS", 40, MYSQL_TYPE_STRING, 0, 0, "IP_Address", SKIP_OPEN_TABLE},
+  {"HOSTNAME", HOSTNAME_LENGTH, MYSQL_TYPE_STRING, 0, 1, "Hostname", SKIP_OPEN_TABLE},
+  {"ERRORS", 10, MYSQL_TYPE_LONG, 0, 0, "Errors", SKIP_OPEN_TABLE},
+  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}
+};
+
 
 /*
   Description of ST_FIELD_INFO in table.h
@@ -6711,6 +6735,8 @@
   {"KEY_COLUMN_USAGE", key_column_usage_fields_info, create_schema_table,
    get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0,
    OPEN_TABLE_ONLY},
+  {"KNOWN_HOSTS", host_cache_fields_info, create_schema_table,
+   fill_cached_hosts, make_old_format, 0, -1, -1, 0, 0},
   {"OPEN_TABLES", open_tables_fields_info, create_schema_table,
    fill_open_tables, make_old_format, 0, -1, -1, 1, 0},
   {"PARTITIONS", partitions_fields_info, create_schema_table,
diff -Nru mysql-5.1.35/sql/table.h mysql-5.1.35-known-hosts/sql/table.h
--- mysql-5.1.35/sql/table.h	2009-05-14 20:35:05.000000000 +0900
+++ mysql-5.1.35-known-hosts/sql/table.h	2009-06-30 22:03:15.000000000 +0900
@@ -880,6 +880,7 @@
   SCH_GLOBAL_STATUS,
   SCH_GLOBAL_VARIABLES,
   SCH_KEY_COLUMN_USAGE,
+  SCH_KNOWN_HOSTS,
   SCH_OPEN_TABLES,
   SCH_PARTITIONS,
   SCH_PLUGINS,