[QUESTION] Filesystem like structure in RAM w/o using filesystem(not ramdisk)

[Indrek Kruusa]

Hello!

As I have understood the accessing ramdisk goes through the same kernel 
path which is meant for accessing slow block device (i_nodes caching etc.).
Is there any other common way (some API above shared memory?) to 
create/open/read/write globally accessible hierarchical datablocks in RAM?
Could it be possibly faster than ramdisk?

Thanks in advance,
Indrek

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