Re: [Xen-devel] PV drivers for HVM guests

["Ky Srinivasan" <ksrinivasan@xxxxxxxxxx>]

>>> On Wed, Oct 4, 2006 at  4:15 AM, in message
<20061004081551.GC6274@xxxxxxxxxxxxxxxxxx>, Muli Ben-Yehuda <muli@xxxxxxxxxx>
wrote: 
> On Wed, Oct 04, 2006 at 08:56:45AM +0100, Keir Fraser wrote:
> 
>> > I have implemented both these schemes for the sles9 kernel and
>> > would like to get your input on your preference. I personally like
>> > option 2. Going forward, the evolution of PV drivers needs to be
>> > constrained by the required support for legacy Linux environments.
>> 
>> A shim layer (i.e., a set of compat macros) that avoids ifdef'ing
>> the core driver code is definitely the way to go.
> 
> FWIW, neither option has a chance of being accepted upstream. For
> upstream acceptance (assuming that it is a goal -   it should be,
> otherwise you forever chase the latest kernel API change, multiplied
> by the number of different distro kernel trees you support) just write
> the latest version of the driver to the latest kernel version. But I
> suspect you already know this :-  )
Agreed. Having a clean shim should help in getting the PV driver code upstream. 

Regards,

K. Y




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