Xen devel - Jan 2010 - Sharing information between Driver Domain and hypervisor

Hello,
I want to share some information between a driver domain for a NIC and the
hypervisor, for eg, the number of packets transferred etc.

To do this, I am using the HYPERVISOR_shared_info in the netback driver,
within the IDD to store the count of number of packets transferred. I have
added some extra fields in the shared_info structure to suit my purpose.
I want to transfer this packet count from netback to the hypervisor.
As i understand, the HYPERVISOR_shared_info page of a domain is shared as
shared_info in the struct domain (defined in sched.h).
But, the data is not propagating from the netback driver to the hypervisor.
Even though the packet count in IDD''s HYPERVISOR_shared_info is
increasing,
the packet count in domain->shared_info does not change.
What am i missing here ? or is there a better way to do this ?

Thanks in advance !

-- 
--
   With Regards ,
       Amod Jaltade


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