Re: [RFC 7/11] virtio_pci: new, capability-aware driver.
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On Wed, Dec 21, 2011 at 11:03:25AM +1030, Rusty Russell wrote: > > > What does the host do > > > if the guest screws things up? How long do you wait for them to > > > complete the seqlock? Or does it save the old version for use in the > > > duration? > > > > Yes, it will have to only apply the change when seqlock is dropped. > > If the seqlock is in normal memory, how does it get notified? It would > have to poll. That's annoying, since you don't know when to give up and > declare the device terminally broken. OK, so you think all devices need a config vq then? It actually has other benefits: - devices don't need a design choice between configuration and vq - minimum number of MSI vectors per device will be 1, not 2 - reduced PCI memory usage - configuration updates become more lightweight -- MST _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization