Investigating further, I find by looking for mmap in the output of /sbin/sysctl an interesting setting called vm.mmap_min_addr.
$ /sbin/sysctl vm.mmap_min_addr vm.mmap_min_addr = 4096 $ GCL_ANSI=t gclcvs [1] 16794 killed GCL_ANSI=t gclcvs $ sudo /sbin/sysctl vm.mmap_min_addr=0 vm.mmap_min_addr = 0 $ GCL_ANSI=t gclcvs GCL (GNU Common Lisp) 2.7.0 ANSI Feb 3 2010 05:59:20 [...] > Interestingly, this is for me on a 2.6.30-1-amd64 kernel. Evet on #lisp says gcl works for him on 2.6.26 with his untouched default vm.mmap_min_addr=65536. [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] Brain, n.: The apparatus with which we think that we think. — Ambrose Bierce, "The Devil's Dictionary" -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org