Xen users - Jun 2009 - Why I''m getting "Couldn''t locate PCI device ... perhaps already in-use?"

server:~# dmesg|grep pciback
[    0.000000] Kernel command line: root=/dev/hda1 ro console=tty0
pciback.permissive pciback.hide=(00:1d.00)(00:1d.01)(00:1d.07)
[    0.000000] Unknown boot option `pciback.permissive'': ignoring
[    1.210945] pciback 0000:00:1d.0: seizing device
[    1.211082] pciback 0000:00:1d.1: seizing device
[    1.211215] pciback 0000:00:1d.7: seizing device
[   41.327529] pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
[   41.334528] pciback pci-2-0: 22 Couldn''t locate PCI device
(0000:00:1d.0)! perhaps already in-use?
[18253.731122] pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
[18253.732869] pciback pci-3-0: 22 Couldn''t locate PCI device
(0000:00:1d.0)! perhaps already in-use?
[18391.064891] pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
[18391.066420] pciback pci-4-0: 22 Couldn''t locate PCI device
(0000:00:1d.0)! perhaps already in-use?
[20416.152309] pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
[20416.159988] pciback pci-5-0: 22 Couldn''t locate PCI device
(0000:00:1d.0)! perhaps already in-use?
[25558.518252] pciback: vpci: 0000:00:1d.0: assign to virtual slot 0
[25558.521958] pciback pci-6-0: 22 Couldn''t locate PCI device
(0000:00:1d.0)! perhaps already in-use?

server:~# lspci
00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM
Controller/Host-Hub Interface (rev 01)
00:02.0 VGA compatible controller: Intel Corporation
82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2
EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC
Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller
(rev 01)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC''97 Audio Controller (rev 01)
05:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VM (LOM)
Ethernet Controller (rev 81)



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