Hi list. I have a question. Is it possible to run a domU 64 bit on a dom0 32 bit? The hardware is a EM64T cpu but I have installed on an 32 bit cpu it runs fine on th EM64T. I would prefere not to reinstall the dom0 and all the domU''s if I have to reinstall the dom0. regards - Karsten _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Someone tells me if I am wrong but you need to have a 64bit dom0 kernel to run a 64 bit domU kernel. But dom0 OS can remain 32 bit, right ? So if you run a 32bit dom0 kernel (with a 32bit OS of course :p ), you are stuck to run a 32 bit domU kernel With a 64bit domO (the OS can be 32 or 64) you can run only a 64bit domU kernel. BUT the domU OS can be 32 or 64... So, to solve your problem, you can recompile your kernels in 64bit mode and it should run smooth even if your OS are 32 bit. You must use 32 bit only kernels or 64bit only kernels. Regards, Christophe Painchaud -----Message d''origine----- De : xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] De la part de Karsten Nielsen Envoyé : Tuesday, July 11, 2006 10:11 AM À : xen mailinglist Objet : [Xen-users] dom0 i386 domU 64 bit ? Hi list. I have a question. Is it possible to run a domU 64 bit on a dom0 32 bit? The hardware is a EM64T cpu but I have installed on an 32 bit cpu it runs fine on th EM64T. I would prefere not to reinstall the dom0 and all the domU''s if I have to reinstall the dom0. regards - Karsten _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > Karsten Nielsen > Sent: 11 July 2006 09:11 > To: xen mailinglist > Subject: [Xen-users] dom0 i386 domU 64 bit ? > > Hi list. > > I have a question. > Is it possible to run a domU 64 bit on a dom0 32 bit? > > The hardware is a EM64T cpu but I have installed on an 32 bit cpu it > runs fine on th EM64T. I would prefere not to reinstall the > dom0 and all > the domU''s if I have to reinstall the dom0.Xen, Dom0 and DomU all have to be the same bitness, 32-bit, 32-bit PAE or 64-bit. This is because there''s no translation layer for translating the calls from 32-bit to 64-bit (or the other way around). It''s in the works to support 32-bit on 64-bit (other way around obviously is a little bit more difficult <grin>). With full virtualization (= HVM = AMD SVM or Intel VT) it''s possible to mix any bitness less or equal to the hypervisor (and Dom0 - which is still paravirtual in this case too - so needs to be same as hypervisor). You can of course run 32-bit applications in the 64-bit OS if you want - it works really well with very few exceptions (32-bit-only, binary-only, kernel-modules being the most obvious case of "doesn''t work in 64-bit OS"). -- Mats> > regards > - Karsten > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users