Re: [Xen-users] 32bit on 64-bit causes guest Kernel oops

["Nathan Widmyer" <lighthousej@xxxxxxxxx>]

I kind of assumed this Xen host server from somebody so I'm not sure how exactly it was setup.
I do know that it had the standard Xen 3.0.3 at install-time and apparently the RPM's were updated:

[root@machine
 ~]# rpm -qa | grep xen
xen-libs-3.1.0-2.fc7
kernel-xen-2.6.20-2925.13.fc7  <--- running host kernel
kernel-xen-2.6.20-2931.fc7
xen-3.1.0-2.fc7

The Xen hypervisor boot shows Xen 3.1.0-rc7.


I'm going to try and FV the install then PV the install later.
I'm thinking it's more of a problem with anaconda than with Xen because the kernel boots and operates somewhat.

On 8/27/07, Jason Solan <jsolan@xxxxxxxxxxxxxxxxxxxx> wrote:

FYI, I've not had any success in getting 32 on 64 working with Fedora 7.
I gave up assuming that its not going to be in the F7 release, even
though its stated as using xen version 3.1.  There was an email on the
fedora-xen mailing list back in June or early July stating that there
was a kernel update coming soon to fix the issue.  I've since applied 2
kernel updates and still get a kernel panic when trying to boot a 32 bit
PV guest.

32-bit HVM's seem to work fine though.

If anyone else has had a success story using the F7 packages please feel
free to correct me.


On Mon, 2007-08-27 at 10:05 -0400, Nathan Widmyer wrote:
> I'm trying to install a RHEL 5 32-bit guest on a F7 64-bit host.
> It seems to crash as its booting anaconda.
>
> Versions:
> Compiled against library: libvir 0.3.1
> Using library: libvir 0.3.1
> Using API: Xen 3.0.1
> Running hypervisor: Xen 3.1.0
>
> Is the version mismatch between the API and hypervisor versions a
> problem?
>
> Serial Console crash:
> Oops: 0000 [#1]
> SMP
> last sysfs file: /class/graphics/fb0/name
> Modules linked in: xenblk xennet iscsi_tcp libiscsi
> scsi_transport_iscsi sr_mod sd_mod scsi_mod ide_cd cdrom ipv6 squashfs
>  pcspkr loop nfs nfs_acl fscache lockd sunrpc vfat fat cramfs
> CPU:    0
> EIP:    0061:[<ee2febc3>]    Not tainted VLI
> EFLAGS: 00010046   (2.6.18-8.el5xen #1)
> EIP is at blkif_int+0xca/0x16b [xenblk]
> eax: 00000000   ebx: c0e5e000   ecx: c07e5e20   edx: 00000000
> esi: 00000000   edi: ca000100   ebp: c0e3f0ac   esp: c071bfa4
> ds: 007b   es: 007b   ss: 0069
> Process init (pid: 235, ti=c071b000 task=c07e2550 task.ti=c07e5000)
> Stack: 00000000 00000001 00000002 00000000 d8e67c7c c0f9a720 00000000
> 00000000
>        00000108 c043ec9b c07e5e20 c06bb828 c06bb800 00000108 fffffffe
> c043ed58
>        c07e5e20 c0f9a720 c07e5df0 00000108 c07e5e20 fffffffe c040672b
> Call Trace:
>  [<c043ec9b>] handle_IRQ_event+0x27/0x51
>  [<c043ed58>] __do_IRQ+0x93/0xe8
>  [<c040672b>] do_IRQ+0x93/0xae
>  [<c053a045>] evtchn_do_upcall+0x64/0x9b
>  [<c0404ec5>] hypervisor_callback+0x3d/0x48
>  [<c0539994>] force_evtchn_callback+0xa/0xc
>  [<c041b8ce>] release_console_sem+0x18c/0x1c6
>  [<c0524d20>] do_con_write+0x64/0x149d
>  [<c04b0689>] inode_has_perm+0x54/0x5c
>  [<c04b0787>] task_has_capability+0x50/0x58
>  [<c0526180>] con_put_char+0x27/0x2a
>  [<c051bc4d>] opost+0x17c/0x192
>  [<c051c36c>] write_chan+0x1ed/0x294
>  [<c0415e6c>] default_wake_function+0x0/0xc
>  [<c0519f23>] tty_write+0x147/0x1d8
>  [<c051c17f>] write_chan+0x0/0x294
>  [<c06e5e40>] af_unix_init+0x0/0x59
>  [<c0519ddc>] tty_write+0x0/0x1d8
>  [<c046271b>] vfs_write+0xa1/0x143
>  [<c0462d0d>] sys_write+0x3c/0x63
>  [<c0404cff>] syscall_call+0x7/0xb
>  =======================
> Code: 00 c7 80 84 00 00 00 00 00 00 00 c7 80 e8 00 00 00 00 00 00 00
> 89 bb fc 13 00 00 80 7d 08 01 77 35 8b 04 24 31 d2 66
>  83 7d 0a 00 <8b> 48 2c 0f 94 c2 e8 7a 99 1c d2 85 c0 74 08 0f 0b ac
> 02 08 f3
> EIP: [<ee2febc3>] blkif_int+0xca/0x16b [xenblk] SS:ESP 0069:c071bfa4
>  <0>Kernel panic - not syncing: Fatal exception in interrupt
>
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