https://bugs.freedesktop.org/show_bug.cgi?id=95427
--- Comment #5 from Chris Wilson chris@chris-wilson.co.uk --- (In reply to Emil Velikov from comment #3)
Guys have you actually looked at the following line ? Aperture size is 268435456 MiB -- That is 256 TiB !!!
That's rather impossible amount if you ask me. So there's either a bug in IGT's gem_aperture_size() or one of the two ioctls
It is correct. The GTT size is 1<<48 bytes.