Xen users - May 2011 - RE: PCI passthrough on PV domU crashes with iommu=soft (fixed)

Fixed  : Double amount of memory from 128 to 256 and iommu works it out fine.

 

RTFEM (read the fucking error message) :

[    0.872160] Kernel panic - not syncing: Out of memory and no killable
processes...

 

 

________________________________________________________________________________________________________________
Frédéric Abel| RTS France BeNeLux | Quantum Corporation 

________________________________

From: Frederic Abel 
Sent: jeudi 5 mai 2011 16:28
To: xen-users@lists.xensource.com
Subject: PCI passthrough on PV domU crashes with iommu=soft

 

Hello ,

 

Following the http://wiki.xen.org/xenwiki/XenPCIpassthrough doc.

I get several issues to perform pci passthrough

 

The config file is in Addendum 0

I''m using the debian XEN 4 and kernel 2.6.32-5 for xen on squeeze dom0
and domu (see addendum 1)

I managed to pci hide the 2 ports (see addendum 2)

 

If not using the iommu=soft I get a FW issue on the 3ware driver (addendum 3) 

The pci looks passing through (addendum 4) but I get no drives behind

I copied /lib/modules/2.6.32-5-xen-amd64 fom Dom0 disk to Domu disk, I do not
think about driver issue.

The passed thought device is claimed by driver: 3w-9xxx in Domu with lcpci -vv.

 

If I''m using the option iommu=soft I get a kernel krash at boot
(Addendum 5)

And I can observe some troublesome message

[    0.020372] PCI: System does not support PCI

[    0.020372] PCI: System does not support PCI

[    0.022547] pnp: PnP ACPI: disabled

 

The worst is the Dom0 has no problem with the 2 pci devices when no hidden.

Dom0 uses exactly same /boot/vmlinuz-2.6.32-5-xen-amd64 and
/boot/initrd.img-2.6.32-5-xen-amd64

 

I''m wondering if my CPU is not too old (addendum 6)

Or If I missed some important steps in my conf.

 

Note I know all is working if I pass the disk raw from dom0 to domu with disk =
[phy:/right path] but I don''t feel this is "clean"; lots of
I/O through Dom0 and not secure to Dom0 (risk of over writes).

 

Thank you for any hints.

Sincerely 

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