Comment 1 for bug 1083058

InnoDB master thread code in question with the dirty reads:
...
  } else if (srv_adaptive_flushing && srv_adaptive_flushing_method == 1) {
...
     for (j = 0; j < srv_buf_pool_instances; j++) {
      buf_pool_t* buf_pool;
      ulint n_blocks;

      buf_pool = buf_pool_from_array(j);

      /* The scanning flush_list is optimistic here */

      level = 0;
      n_blocks = 0;
      bpage = UT_LIST_GET_FIRST(buf_pool->flush_list);

      while (bpage != NULL) {
       ib_uint64_t oldest_modification = bpage->oldest_modification;
       if (oldest_modification != 0) {
        level += log_sys->max_checkpoint_age
          - (lsn - oldest_modification);
       }
       bpage = UT_LIST_GET_NEXT(flush_list, bpage);
       n_blocks++;
      }
...