* Anthony Liguori ([EMAIL PROTECTED]) wrote: > Logically speaking, virtio is a bus. virtio supports all of the features > of a bus (discover, hot add, hot remove). > > Right now, we map virtio devices directly onto the PCI bus. > > The problem we're trying to address is limitations of the PCI bus. We have > a couple options:
First question is if we have a real limitation with multiple busses? > 1) add a virtio device that supports multiple disks. we need to reinvent > hotplug within this device. > > 2) add a new PCI virtio transport that supports multiple virtio-blk devices > within a single PCI slot > > 3) add a generic PCI virtio transport that supports multiple virtio devices > within a single PCI slot compare and contrast above with HBA and disks (makes most sense from my point of view). for 2 and 3, only difference is whether you want to be able to support nics, balloons, and block devices on same pci slot (at which point it's a bridge, how is it different from 4?) > 4) add a generic virtio "bridge" that supports multiple virtio devices > within a single virtio device. > > #4 may seem strange, but it's no different from a PCI-to-PCI bridge. > > I like #4 the most, but #2 is probably the most practical. Also, your current patch does not work for hotplug disk. thanks, -chris ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
