[Xen-users] PCI Frontend causes Kernel Panic in Dom0

[Ernie Fontes <efontes@xxxxxxxxxxxxxx>]

I am running Xen off of the lastest 3.0-testing source.

I am trying to activate PCI Frontend in my Xen kernel (I use the same kernel
for both Dom0 and VMs) but I ran into an error.  Trying to follow the
directions in the Users' Manual and XenFaq, I enabled Bus Options -> PCI
Access Mode -> Xen PCI Frontend and rebuilt my Xen kernel.  Previously, the
kernel booted and ran VMs fine.  Xen PCI Backend was already enabled, so I
didn't touch that setting---PCI Frontend was all I changed.  Nevertheless,
upon restarting my Dom0 I received this kernel panic:

...
[<c03e31bd>] acpi_scan_init+0xc8/0xe9
[<c010210a>] init+0xda/0x390
[<c0102030>] init+0x0/0x390
[<x0102bc5>] kernel_thread_helper+0x5/0x10
Code: 20 74 12 83 fa 08 66 b8 01 00 75 51 eb 0e b8 02 00 00 00 eb 0c b8 04
00 00 00 eb 05 b8 01 00 00 00 8b 0d 70 4e 43 c0 85 c9 75 02 <0f> 0b 56 50 ff
74 24 18 0f b7 43 04 0f b7 53 06 83 e0 1f 83 e2
<0>Kernel panic - not syncing: Attempted to kill init!

Anyone seen this before?  Any ideas on how to avoid this panic but still
activate PCI Frontend?

-----
Ernie Fontes
ATC-NY
efontes@xxxxxxxxxxxxxx


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