Yuri, can you help to clarify this?
I see here several questions: 1. Whether it is ok for the device not to indicate support for XXX_EX hash type? - I think, yes (strictly speaking, it was better to test that before submitting the patches ) 2. Is it possible that the guest will enable some XXX_EX hash type if the device does not indicate that it is supported? - No (I think this is part of the spec) 3. What to do if we migrate between systems with different capabilities of hash support/reporting/whatever - IMO, at this moment such case should be excluded and only mechanism we have for that is the compatible machine version - in some future the change of device capabilities can be communicated to the driver and _probably_ the driver might be able to communicate the change of device capabilities to the OS 4. Does it make sense to have fine configuration of hash types mask via command-line? - IMO, no. This would require the user to have too much knowledge about RSS internals
Please let me know if I missed something.