On Wed, Aug 13, 2014 at 7:41 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: > On 08/13/2014 11:44 AM, H. Peter Anvin wrote: >> On 08/13/2014 11:33 AM, Andy Lutomirski wrote: >>> >>> As for doing arch_random_init after clone/migration, I think we'll >>> need another KVM extension for that, since, AFAIK, we don't actually >>> get notified that we were cloned or migrated. That will be >>> nontrivial. Maybe we can figure that out at KS, too. >>> >> >> We don't need a reset when migrated (although it might be a good idea >> under some circumstances, i.e. if the pools might somehow have gotten >> exposed) but definitely when cloned. >> > > But yes, we need a notification. For obvious reasons there is no > suspend event (one can snapshot a running VM) but we need to be notified > upon wakeup, *or* we need to give KVM a way to update the necessary state. This could presumably use the interrupt mechanism on virtio-rng if we're willing to depend on having host support for virtio-rng. v6 (coming in a few minutes) will at least get it right when the kernel goes through the resume path (i.e. not KVM/QEMU suspend, and maybe not S0ix either). --Andy -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
