On 2016-03-01 22:26, Richard W.M. Jones wrote: > On Mon, Feb 29, 2016 at 03:20:03PM +0000, Michael Howard wrote: >> Just to let you know, I can't get this to work. aarch64 is supposed >> to be binary compatible, with the correct libraries installed, but >> I'm thinking the cpu isn't. >> >> All I get is 'cannot execute binary file: Exec format error', >> regardless of what I try. > > As I understand it the problem is page size - 64K was chosen by > Red Hat for aarch64, where as 4K is the norm on armv7. I shall leave this link here without further comment, regarding using pages that are bigger than 4KB: http://yarchive.net/comp/linux/page_sizes.html > Anyway, you can run a 32 bit VM and it works well -- in fact a lot > faster than regular 32 bit armv7 hardware. Given what x86 hypervisor overheads are under heavy concurrent loads, I'd say that rather depends on what ARMv7 hardware is being compared. Gordan