STINNER Victor <victor.stin...@haypocalc.com> added the comment: More info about FreeBSD.
"sysctl p1003_1b.sem_nsems_max" gives the maximum number of POSIX semaphores (per process? system wide?). Since FreeBSD 8.1, "sudo sysctl -w p1003_1b.sem_nsems_max=256" can be used to change this limit at runtime. Before FreeBSD 8.1, SEM_MAX constant should be changed in the kernel source code, and the kernel have to be recompiled. (p1003_1b.sem_nsems_max is not configurable in /etc/sysctl.conf, it is an hardcoded limit). Before FreeBSD 8.0, the POSIX semaphores are disabled by default: the kernel have to be compiled using P1003_1B_SEMAPHORES option. Extract of sys/conf/NOTES: ##################################################################### # POSIX P1003.1B # Real time extensions added in the 1993 POSIX # _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING options _KPOSIX_PRIORITY_SCHEDULING # p1003_1b_semaphores are very experimental, # user should be ready to assist in debugging if problems arise. options P1003_1B_SEMAPHORES # POSIX message queue options P1003_1B_MQUEUE ##################################################################### ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue10348> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
