20 messages in org.freebsd.freebsd-hackersKernel [memory] tweaking question| From | Sent On | Attachments |
|---|---|---|
| Matt | Apr 4, 2005 11:43 am | |
| Devon H. O'Dell | Apr 4, 2005 11:49 am | |
| Marc Olzheim | Apr 4, 2005 11:49 am | |
| Joerg Sonnenberger | Apr 4, 2005 11:51 am | |
| Dan Nelson | Apr 4, 2005 11:55 am | |
| Mike Meyer | Apr 5, 2005 4:50 am | |
| gilles chehade | Apr 5, 2005 4:50 am | |
| Dunceor . | Apr 5, 2005 4:50 am | |
| ra...@redshift.com | Apr 5, 2005 5:25 am | |
| Peter Jeremy | Apr 7, 2005 1:36 am | |
| Stijn Hoop | Apr 7, 2005 1:39 am | |
| ra...@redshift.com | Apr 7, 2005 1:50 am | |
| ra...@redshift.com | Apr 7, 2005 1:51 am | |
| Zera William Holladay | Apr 7, 2005 7:24 am | |
| Robert Watson | Apr 7, 2005 12:08 pm | |
| Michael Shalayeff | Jul 7, 2005 12:08 pm | |
| chaton | Jul 7, 2005 12:08 pm | |
| Juan J. Martínez | Jul 7, 2005 12:10 pm | |
| Juan J. Martínez | Jul 7, 2005 12:10 pm | |
| Mike Meyer | Jul 8, 2005 12:25 pm |
| Subject: | Kernel [memory] tweaking question | |
|---|---|---|
| From: | Zera William Holladay (zhol...@uic.edu) | |
| Date: | Apr 7, 2005 7:24:25 am | |
| List: | org.freebsd.freebsd-hackers | |
On Thu, 7 Apr 2005, Peter Jeremy wrote:
These are all reasonably well documented in sys/conf/NOTES. If you want more detail, try a SystemV-oriented Unix book
Close - they only control SystemV shared memory. Sane shared memory is available via mmap(2). SystemV semaphores are controlled via SEMxxx options. Posix semaphores are listed as 'experimental'.
Is there any chance that POSIX semaphores will be anything other than experimental in the future, or is there no interest? Further, the man page indicates that the FreeBSD, POSIX semaphore implementation is not capable of supporting multiple process semaphores. I saw a similar note on a Linux man page. I think this is a shame, since POSIX semaphores seem to be well designed (from a user point of view) compared to SYSV semaphores, which are a total mess.
-Zera