-- The "losetup" command knows a "-P" parameter. It triggers a
partition scan on newly created loop devices. This means, when
handling full disk images which include partitions, you simply
get "/dev/loop0p1" and friends. That's really, really useful.
(And it has been around since 2012...)
-- The number of loop devices once was static. Since around linux
3.1, there now is a "/dev/loop-control" which will be used by
"losetup". This control interface can be used to create new loop
devices on demand. Yes, there are still eight loop device nodes
by default ("/dev/loop0" through "/dev/loop") but that doesn't
mean anything. Once they're full or when you address a "dead"
device, it'll be created on the fly. (I'm not sure if this means
that you can have an unlimited number of loop devices.)
-- You can view parameters of currently loaded kernel modules in
"/sys/module/$module/parameters/".
