Message125042
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
##################################################################### |
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Date |
User |
Action |
Args |
2011-01-02 12:12:41 | vstinner | set | recipients:
+ vstinner, db3l, jnoller, asksol |
2011-01-02 12:12:41 | vstinner | set | messageid: <1293970361.09.0.846946342167.issue10348@psf.upfronthosting.co.za> |
2011-01-02 12:12:36 | vstinner | link | issue10348 messages |
2011-01-02 12:12:36 | vstinner | create | |
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