>>> mmap() has the file system.
>>I wasn't aware that mmap() was part of SysV shared memory. 

>It is NOT. It is another (POSIX) way of getting shared memory bewteen 
>processes. Even without MAP_SHARED OS will share un-modified pages 
>between processes.

...

>SysV IPC is a mess IMHO. 

For a good time, see Camel 3's introductory discussion of SysV IPC. :-)

--tom

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