/* Improve fragment distribution and reduce our average
* search time by starting our next search here. (see
* Knuth vol 1, sec 2.5, pg 449) */
- if (free_slob_pages.next != prev->next)
+ if (prev != free_slob_pages.prev &&
+ free_slob_pages.next != prev->next)
list_move_tail(&free_slob_pages, prev->next);
break;
}