Alrighty then...
need a way to telll qemu to use discard="unmap" so that FITRIM() will pass
through, to reduce image sizes
https://github.com/clalancette/oz/issues/301
driver type raw-xz supports discard=unmap?
https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg04123.html
Guess we'll see where this goes.
--
Chris Murphy