[libvirt-users] automatically detaching PCI host devices from guest for SRIOV usage.

[Rajesh Kumar Mallah]

| Dear Alex ,
| 
| What logging level is useful for you ? 
| 
| Dear Rajesh,
| 
| Level 1 (Debug) should be enough, but I guess it probably hasn't more
| help for us, you had better to login the guest then check network when you were
| meeting this issue again, for example, to check if network configuration is valid and try
| to restart relevant network services to see if the guest network can work again
| or something like that, In addition, you shut down the guest via running 'halt' in
| the guest,| Does it work for you if you use libvirt relevant interface such as
| 'virsh shutdown guest'
| or 'virsh destroy guest'?    


Dear Alex ,

The Guest is a minimal debian squeeze install without any GUI desktop 
in it .  Below is the relevant /etc/network/interfaces file.

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
auto eth0
iface eth0 inet static
        address 192.168.101.11
        netmask 255.255.0.0
        gateway 192.168.1.1

------------------------- end of interfaces file ----------------
the allow-hotplug on eth0 allow network to be automatically 
configured once the attach-device is done. similarly detach-device
is handled gracefully.

Before posting we have done multiple permutations and combinations 
of many config parameters and activities. This includes shutting down the
guest via 'halt' and 'destroy|shutdown' from the virsh interface. It does
not help or makes difference.

Most surprisingly there is no alarming messages that are shown 
in any of the logs , be it the syslog of host or syslog of guest,
I have however not seen the libvirtd.log in debug mode which i 
shall do in a while.

I would also like to tell that the issues was discussed in the
intel forum but no conclusive solution could be found. The link
is:

http://communities.intel.com/message/164211#164211

I am sorry for the bit late response but i assure my continued 
feedback regarding this issue. We are working on a test (spare) 
hardware and it is easy for us to test any configuration or patches

The platform is : SuperMicro AMD Opteron Hardware , with IOMMU 
and SRIOV enabled , intel 82599EB based dual SFP+ port , linux 
kernel 3.5.1 from kernel.org.


Regds
mallah

| 
| 
| Regards,
| Alex
| 
| 
| 
| Regards,
| Rajesh Kumar Mallah
| Tel. 91-11-46710500 (Ext:303)
| Cell +919811255597
| Website: http://www.tradeindia.com/
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