RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfrontdriver impacted?

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

From: Keir Fraser
Sent: 2006年11月6日 2:00

        > bit cheesy as far as I can see, so something more integrated in the 
        > tpmfront/back protocol would be nice. 

        In terms of time needed for migration there won't be a difference. Is 
supporting that .suspend really so problematic? 

        Well, we are going to handle save/restore and migration failure by 
continuing execution of the original domain. In this case xenbus_resume() will 
not be executed, so tpmfront will (I think) hang.

        I suppose we could keep suspend() and also introduce a 
suspend_cancelled() hook...

         -- Keir

When you said "xenbus_resume" will not be executed, could I suppose that only 
per-PV drivers' resume handler won't be invoked, while instead xb_init_comms 
and 
xs_resume are still invoked just after resuming point? In any case, we still 
need
rebuild xenbus channel first, and then to let PV drivers detecting re-connect, 
am I
right?

Thanks,
Kevin

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