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    SubjectRE: [RFC qemu 0/4] A PV solution for live migration optimization
    Date
    > >  Could provide more information on how to use virtio-serial to exchange
    > data? Thread , Wiki or code are all OK.
    > > I have not find some useful information yet.
    >
    > See this commit in the Linux sources:
    >
    > 108fc82596e3b66b819df9d28c1ebbc9ab5de14c
    >
    > that adds a way to send guest trace data over to the host. I think that's the
    > most relevant to your use-case. However, you'll have to add an in-kernel
    > user of virtio-serial (like the virtio-console code
    > -- the code that deals with tty and hvc currently). There's no other non-tty
    > user right now, and this is the right kind of use-case to add one for!
    >
    > For many other (userspace) use-cases, see the qemu-guest-agent in the
    > qemu sources.
    >
    > The API is documented in the wiki:
    >
    > http://www.linux-kvm.org/page/Virtio-serial_API
    >
    > and the feature pages have some information that may help as well:
    >
    > https://fedoraproject.org/wiki/Features/VirtioSerial
    >
    > There are some links in here too:
    >
    > http://log.amitshah.net/2010/09/communication-between-guests-and-
    > hosts/
    >
    > Hope this helps.
    >
    >
    > Amit

    Thanks a lot !!

    Liang

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