Suplement. High cpu load appears in random time interval. All filesystems which has this problem was created with smaller than default block size. I've got a few other fs with small black size but thread flush-254 always appear on the same device. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html