RE: [Xen-users] 32bit guest on 64bit host

[Maurício Ramos <Mauricio.Ramos@xxxxxxxxxxxxxxxxxxxx>]

Hello Pasi, thanks for the reply and the URLs.

At the graphical console, I can read...

"
.
.
.
Booting from CD-Rom...

ISOLINUX 3.63 Mandriva Linux Copyright (c) 1994-2008 H. Peter Anvin
Loading...
"

...and it stays in this "Loading..." and never goes ahead, no matter we use the 
cdrom or an iso image.

We are considering the usage of other distros and the update of the system.

Thanks again.

-----Original Message-----
From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
Sent: quinta-feira, 8 de abril de 2010 15:59
To: Maurício Ramos
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] 32bit guest on 64bit host

On Thu, Apr 08, 2010 at 07:12:03PM +0100, Maurício Ramos wrote:
> Hello Pasi, thanks for the feedback. Here goes the output of "xm info"
>
> [root@fpwdev04 ~]# xm info
> host                   : fpwdev04.wedo.pt
> release                : 2.6.18-128.el5xen
> version                : #1 SMP Wed Dec 17 12:01:40 EST 2008
> machine                : x86_64
> nr_cpus                : 4
> nr_nodes               : 1
> sockets_per_node       : 1
> cores_per_socket       : 4
> threads_per_core       : 1
> cpu_mhz                : 1861
> hw_caps                : 
> bfebfbff:20100800:00000000:00000140:0004e3bd:00000000:00000001
> total_memory           : 3071
> free_memory            : 1
> node_to_cpu            : node0:0-3
> xen_major              : 3
> xen_minor              : 1
> xen_extra              : .2-128.el5
> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
> hvm-3.0-x86_32p hvm-3.0-x86_64

So you're able to run both 32b and 64b hvm (fully virtualized) guests,
and also 32b pae and 64b PV (paravirtualized) guests.

> xen_pagesize           : 4096
> platform_params        : virt_start=0xffff800000000000
> xen_changeset          : unavailable
> cc_compiler            : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)
> cc_compile_by          : mockbuild
> cc_compile_domain      : redhat.com
> cc_compile_date        : Wed Dec 17 11:37:15 EST 2008
> xend_config_format     : 2
>
> I do not what is PV or HVM but I am trying to create a full virtualized 
> mandriva 2009. In addition, we have other 32 bit VMs running in another 
> server (same OS, Xen, etc.) and they are Linux distros much older.
>

See: http://wiki.xensource.com/xenwiki/XenOverview for explanation about PV vs. 
HVM.

Do you see anything on the HVM guest graphical console?
Xen in RHEL5 is getting old.. especially for recent HVM guests.

You might want to try the external/3rdparty Xen 3.4.2 rpms for EL5
from http://gitco.de/repo/

-- Pasi

> -----Original Message-----
> From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> Sent: quinta-feira, 8 de abril de 2010 15:02
> To: Maurício Ramos
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] 32bit guest on 64bit host
>
> On Thu, Apr 08, 2010 at 06:49:33PM +0100, Maurício Ramos wrote:
> >    Hello, we have a RedHat Enterprise Linux 5 with xen kernel but can not
> >    boot 32bit iso/cds to install 32bit guests. The boot stops when it starts
> >    the loading processes. We use the GUI "Virtual Machine Console" and we
> >    configuring the machine there is an architecture option but is is not
> >    enable for us to set the one we want. How to workaround this? Thanks for
> >    any help!
> >
>
> Are you trying to create PV or HVM guest?
>
> Do you have HVM support in your CPU/BIOS?
>
> What does "xm info" say about capabilities? Do you see hvm listed?
>
> -- Pasi
>
> >
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