1Description: 2------------ 3This tests checks the wb_kupdate code path by writting data to a sparse file 4mounted on a loop back device formated with a user specified filesystem, 5and waiting a maximum of 'max_flush_time' for writeback to flush the dirty 6datat from the cache to disk. 7 8At the end of the test a keyval is generated which states per iteration the time 9taken to write the user specified amount of data to disk. 10