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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC][PATCH 0/5] Add V4V to Xen
On 14 June 2012 16:35, Tim Deegan <tim@xxxxxxx> wrote: > At 16:10 +0100 on 14 Jun (1339690244), Jean Guyader wrote: >> On 14/06 03:56, Tim Deegan wrote: >> > At 11:55 +0100 on 14 Jun (1339674908), Jean Guyader wrote: >> > > Are you talking about having different version of V4V driver running >> > > in the same VM? >> > >> > Yes. >> > >> > > I don't think that is a problem they both interact with Xen via >> > > hypercall directly so if they follow the v4v hypercall interface it's >> > > all fine. >> > >> > AFAICS if they both try to register the same port then one of them will >> > silently get its ring discarded. And if they both try to communicate >> > with the same remote port their entries on the pending lists will get >> > merged (which is probably not too bad). I think the possibility for >> > confusion depends on how you use the service. Still, it seems better >> > than the xenstore case, anyway. :) >> > >> >> Not silently, register_ring will return an error. > > Will it? It looks to me like v4v_ring_add just clobbers the old MFN > list. > Ha yes. It does that now but I think it should return an error informing up the stack that a ring has already been registered. Jean _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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