I''m unclear about what 32 on 64 means and how one uses it. I have a 64 bit box running a 64 bit Xen 3.1.0 and a 64 bit dom0. I want to install a 32 bin HVM domU. Do I need to do anything special? The new 32-on-64 features in 3.1.0 are only for PV guests and not for HVM, right? Will it just act like I was running a 32 bit OS on 64 bit hardware or will it pretend to be 32 bit hardware? Will it use more memory like an OS in 64 bits? Thanks! -Dylan _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> I''m unclear about what 32 on 64 means and how one uses it. > > I have a 64 bit box running a 64 bit Xen 3.1.0 and a 64 bit dom0. > > I want to install a 32 bin HVM domU. Do I need to do anything > special?Not that I know of... 32-on-64 is specifically a feature for PV guests; HVM has been able to run 32-bit OSes on a 64-bit platform for ages.> The new 32-on-64 features in 3.1.0 are only for PV guests and not for > HVM, right?I *think* that 32-on-64 might enable you to use paravirtualised devices in your 32-bit HVM guests where previously you couldn''t. I''m not 100% on this though.> Will it just act like I was running a 32 bit OS on 64 bit hardware or > will it pretend to be 32 bit hardware?Yep, I reckon that''ll work.> Will it use more memory like an OS in 64 bits?It''ll be running in 32-bit mode, so this shouldn''t be the case. Cheers, Mark -- Dave: Just a question. What use is a unicyle with no seat? And no pedals! Mark: To answer a question with a question: What use is a skateboard? Dave: Skateboards have wheels. Mark: My wheel has a wheel! _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Dylan Martin wrote:> I''m unclear about what 32 on 64 means and how one uses it. > > I have a 64 bit box running a 64 bit Xen 3.1.0 and a 64 bit dom0. > > I want to install a 32 bin HVM domU. Do I need to do anything > special? >For HVM the bitness of the host doesn''t matter (I don''t think Xen does 64 on 32 but 32 on 64 should be transparent). A 32bit virtual machine looks exactly like a 32bit real machine to the OS that''s running on it, so it''ll use the same amount of memory - pretty much fixed by the amount you give the domU. Tony _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users