It''s my understanding that 32bit PV vms would run on 64bit hosts with Xen 3.1. However, this doesn''t seem to work. Attempting to use virt-install from 64bit using a 32bit source files (over http) dies almost instantly. Creating the 32bit PV vm on a 32-bit system and copying to 64bit also doesn''t work (dies at start before even a hint of starting.) Same when migrating a 32bit to a 64 bit (again, dies instantly.) Am I wrong about 32bit on 64bit hosts?
Jim Klein wrote:> It''s my understanding that 32bit PV vms would run on 64bit hosts with > Xen 3.1. However, this doesn''t seem to work. Attempting to use > virt-install from 64bit using a 32bit source files (over http) dies > almost instantly. Creating the 32bit PV vm on a 32-bit system and > copying to 64bit also doesn''t work (dies at start before even a hint of > starting.) Same when migrating a 32bit to a 64 bit (again, dies > instantly.) Am I wrong about 32bit on 64bit hosts? > >Yes and no. The problem is that F7 kernel side is based on 3.0.4, while the hypervisor and the userland tools are based on 3.1. Without the kernel being updated to 3.1, 32 pv on 64 HV won''t work. Luckily, that kernel is forthcoming for F7. Chris Lalancette
On Wed, Jun 06, 2007 at 10:14:12AM -0700, Jim Klein wrote:> > It''s my understanding that 32bit PV vms would run on 64bit hosts with > Xen 3.1. However, this doesn''t seem to work. Attempting to use > virt-install from 64bit using a 32bit source files (over http) dies > almost instantly. Creating the 32bit PV vm on a 32-bit system and > copying to 64bit also doesn''t work (dies at start before even a hint > of starting.) Same when migrating a 32bit to a 64 bit (again, dies > instantly.) Am I wrong about 32bit on 64bit hosts?We weren''t too clear in the release notes unfortunately. When we updated to the Xen 3.1.0 hypervisor & userspace we gained the ability to run 32-bit guests on 64-bit HV in theory. To make it work in practice we''re waiting on some updates to the kernel Dom0 drivers. Hopefully we''ll get these into an update kernel-xen without too much delay... Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|