Please note that in the RHEL5.1 release notes:

"This update to the Virtualization feature also includes the capability to
install and run paravirtualized 32-bit guests on 64-bit hosts. However, this
capability is provided as a Technology Preview; as such, it is not supported
for production use."

This means that it might or might not work, etc....  but I will try this out
for you today if I get a chance and will let you know my findings unless
someone responds before I do.

-- Robin

On Jan 15, 2008 6:22 AM, Ben <[EMAIL PROTECTED]> wrote:

> Hi there,
>
> I'm currently running RHEL 5.1 64-bit fully patched and kernel
> 2.6.18-53.1.4.el5xen on a Sun x4200 M2 (8GB, 4 cores).  I am attempting to
> install RHEL 4.6 32-bit (kernel 2.6.9-67xen) as a paravirtualised guest.
>
> Within the RHEL5 Dom0 I start the guest using "xm create -c template" and
> the below configuration file.
>
> ##################################################
> kernel = "/etc/xen/vmlinuz4"
> ramdisk = "/etc/xen/initrd4.img"
> name = "template"
> memory = "4096"
> disk = [ 'tap:aio:/VM-storage/template,xvda,w', ]
> vif = [ 'bridge=xenbr0', ]
> vcpus=2
>
> on_reboot   = 'destroy'
> on_crash    = 'destroy'
> ##################################################
>
> The kernel and ramdisk are from the RHEL 4.6 install tree which is located
> on an HTTP-accessible web server (running Apache, local subnet).  The file
> /VM-storage/template was created using the command
>
> dd if=/dev/zero of=/VM-storage/template oflag=direct bs=1M seek=409600
> count=1
>
> Every time I try the install manually (I haven't figured out Xen
> kickstarting yet, suggestions on how to provide a kickstart file to the
> DomU
> please?) I whistle through the setup screens and then let the installation
> start the package installation, at which point it slows to a crawl or even
> stops on a package with the status "Installing...".  The web server is
> definitely not overloaded as I've kickstarted ten RHEL5 boxes before now
> concurrently with no slowdown.
>
> However the worst is yet to come...  Usually after a little while of
> installing the RHEL4 kernel panics and I'm dumped back out to Dom0.  I've
> tried this with the previous RHEL 4.5 media (copied to the web server)
> too.
> It tends to fail earlier.
>
> Here's the most recent error during text-mode installation:
>
> Oops: 0000 [#1]
> SMP
> Modules linked in: dm_snapshot dm_mirror dm_zero dm_mod ext3 jbd msdos
> raid6
> raid5 xor raid1 raid0 xenblk xennet sr_mod sd_mod scsi_mod cdrom loop nfs
> nfs_acl lockd sunrpc vfat fat cramfslements
> CPU:    0
> EIP:    0061:[<c01496c9>]    Not tainted VLI
> EFLAGS: 00010287   (2.6.9-67.ELxenU)
> EIP is at zap_pte_range+0x279/0x489
> eax: 00037000   ebx: 00000002   ecx: f5392000   edx: 00000000
> esi: 001163b1   edi: c6c8d9a0   ebp: 00000000   esp: ec1bae04
> ds: 007b   es: 007b   ss: 0068
> Process anaconda (pid: 419, threadinfo=ec1ba000 task=ec3a3830)
> Stack: 163b1067 00000001 00000000 00000000 00000000 00000000 00037000
> 0c800000
>        c347d2a0 cf23a328 0c837000 00000001 0c800000 c0149980 c347d2a0
> cf23a320
>        0c800000 00037000 00000000 0c7b7000 d0df6008 0c837000 00000000
> c01499e5
> Call Trace:
>  [<c0149980>] zap_pmd_range+0xa7/0xcb
>  [<c01499e5>] unmap_page_range+0x41/0x65
>  [<c0149ad6>] unmap_vmas+0xcd/0x1e8
>  [<c014ec19>] exit_mmap+0x85/0x15b
>  [<c011a2d9>] mmput+0x52/0x77
>  [<c011a74b>] copy_mm+0x36c/0x396
>  [<c011b26a>] copy_process+0x6b5/0xb0b
>  [<c011b7ad>] do_fork+0x8a/0x16b
>  [<c0127372>] sigprocmask+0xb6/0xd0
>  [<c0127423>] sys_rt_sigprocmask+0x97/0x14c
>  [<c0105cd7>] sys_fork+0x16/0x1a
>  [<c010734f>] syscall_call+0x7/0xb
> Code: 8b 4c 24 14 8b 41 04 85 c0 75 0a 83 39 00 0f 45 c1 89 44 24 14 c7 44
> 24 10 00 00 00 00 8b 44 24 18 39 44 24 10 0f 83 08 02 00 00 <8b> 55 00 8b
> 4d
> 04 85 d2 75 08 85 c9 0f 84 e6 01 00 00 88 d0 a8
>  <0>Fatal exception: panic in 5 seconds
> Kernel panic - not syncing: Fatal exception
>
> All of my xen stuff appears to be at version 3.0.3-41.  Does anyone have
> any
> suggestions what I'm doing wrong or what is happening, please?
>
> Ben
> --
> Unix Support, MISD, University of Cambridge, England
> Plugger of wire, typer of keyboard, imparter of Clue
>         Life Is Short.          It's All Good.
>
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