There was a single static path buffer being shared between multiple file
i/o threads. So sometimes you would end up using the wrong path for the
file, and getting size/data for the wrong file.
I think the original reason to have this buffer was just me being lazy
when we changed how project paths works a long time ago. It was a bad
idea in the first place.
Avoids blocking other IOP threads on IO.
Idk if it'll really help anything, but at least theoretically it might
stop some pathologically slow IO case from blocking the VAG buffer
switching.
ManDude