On Wednesday 18 February 2009 3:18:03 am Bruce Simpson wrote: > John Baldwin wrote: > > Author: jhb > > Date: Tue Feb 17 19:57:52 2009 > > New Revision: 188727 > > URL: http://svn.freebsd.org/changeset/base/188727 > > > > Log: > > MFC: Rework the lifetime management of the kernel implementation of POSIX > > semaphores. Specifically, semaphores are now represented as new file > > descriptor type that is set to close on exec. This removes the need for > > all of the manual process reference counting (and fork, exec, and exit > > event handlers) as the normal file descriptor operations handle all of > > that for us nicely. It is also suggested as one possible implementation > > in the spec and at least one other OS (OS X) uses this approach. > > FYI: > This change *may* fix Python 2.6's 'multiprocessing' module on FreeBSD > 7-STABLE, which is known to have problems there; it depends on POSIX > semaphores to synchronize its IPC between different fork()'s of the > Python interpreter. > > If anyone else has an interest in ths they may wish to test, if not, I > will try to get around to it eventually.
When Kris tested it, it made things significantly better. I'm not sure if it resolved all the issues though. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
