I create a ramfs during boot and map the file to all process (during process creation) at same address range to facilitate zero copy during IPC. I do see address range mapped to all processes.
root@10.2.40.206:/home/asathe# cat /proc/2285/maps
0804d000-080b4000 rw-p 0804d000 00:00
0 [heap]
9bef8000-b93b8000 rw-s 00000000 00:08
498 /icmmem (deleted)