Just tried without Xen network driver and got the same behaviour.
Would say hopefully because removing xen network driver prevent me to
use my domU as firewall for dom0 as I intented to do.
BTW, have no idea left :-/
Le 12/01/2011 16:53, Jean Baptiste Favre a écrit :
> Hello Konrad,
> Le 12/01/2011 16:43, Konrad Rzeszutek Wilk a écrit :
>> On Wed, Jan 12, 2011 at 04:38:49PM +0100, Jean Baptiste Favre wrote:
>>> I'm facing a strange issue with network card PCI passthrough on my
>>> openwrt test domU.
>>> - With network PCI passthrough, DNS lookup failed for some domains
>>> (exemple, google.com) but not for other (free.fr my ISP, or my domain
>>> jbfavre.org). I can ping an IP address without any problem.
>> Do you have "both" (so PCI passthrough and the Xen network driver)
>> in the guest? If so, have you tried eliminating the xen network driver
>> to see if it is just a routing issue?
> Have not tried to eliminate xen network driver. Think I have both drivers.
> My kernel .config looks like:
> $ grep XEN build_dir/linux-x86_xen_domu/linux-2.6.37/.config
> # CONFIG_XEN_PRIVILEGED_GUEST is not set
> # CONFIG_XEN_PLATFORM_PCI is not set
> So, I should remove CONFIG_XEN_NETDEV_FRONTEND ?
>> What does your routing table look like? Your IP table?
> My routing table is pretty clean, nothing strange here
> # route -n
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> 10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0
> 0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0
>>> - Starting domU as a "normal" (ie without PCI passthrough), no problem.
>>> As far as I can say, domU is not the root cause. I really think this is
>>> related to PCI passsthrough. This seems to be related to packet length.
>> Then that would imply the MTU is not set right.
> Already checked it: 1500 :)
>>> Did not see anything strange in dom0 logs.
>>> Is there any incompatibility between 2.6.32 dom0 kernel with Xen 4.0.1
>>> and 2.6.37 domU kernel ?
> So, will try to remove Xen Network driver and see what happen.
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