Aniruddha Bohra Eran Gabber Are Mallocs Free of Fragmentation? 105-117 2001 conf/usenix/2001f USENIX Annual Technical Conference, FREENIX Track http://www.usenix.org/publications/library/proceedings/usenix01/freenix01/bohra.html db/conf/usenix/usenix2001f.html#BohraG01