Features/ArchitectureSupport - x86_64 kernel 32 bit userspace

[Bill Nottingham]

Matthew Garrett (mjg at redhat.com) said: 
> > Should work (solaris had a similar setup and they supported it)
> 
> You lose vm86() mode, so dosemu won't work. You also have to hope that 
> all the ioctl compatibility works - historically this hasn't been the 
> case for all subsystems.

But any such subsystems where this is the case are already broken
on ppc64/sparc64.

Bill