<casper....@oracle.com> wrote: > >It gets even better. Executables become part of the swap space via > >mmap, so that if you have a lot of copies of the same process running in > >memory, the executable bits don't waste any more space (well, unless you > >use the sticky bit, although that might be deprecated, or if you copy > >the binary elsewhere.) There's lots of awesome fun optimizations in > >UNIX. :) > > The "sticky bit" has never been used in that form of SunOS for as long > as I remember (SunOS 3.x) and probably before that. It no longer makes > sense in demand-paged executables.
SunOS-3.0 introduced NFS-root and swap on NFS. For that reason, the meaning of the sticky bit was changed to mean "do not cache write this file". Note that SunOS-3.0 appeared with the new Sun3 machines (first build on 24.12.1985). Jörg -- EMail:jo...@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin j...@cs.tu-berlin.de (uni) joerg.schill...@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss