Hi,

man (2) mmap says:

     MAP_ANON    Map anonymous memory not associated with any specific file.
                 The file descriptor used for creating MAP_ANON regions is
                 used only for naming, and may be specified as -1 if no name
                 is associated with the region.

But the ERRORS section of the same man page and the code in 
sys/uvm/uvm_mmap.c suggest that the file descriptor must be -1 when 
using MAP_ANON. Has this feature (creating a MAP_ANON region with an fd 
used only for naming) been removed or has it not been implemented yet? 
Or am I just confused?

Regards,
Erik