Hi, 

        I'm not sure if this is the correct venue for this question; feel
        free to redirect.

        When I start debian or ubuntu guests on a debian host running KVM
        0.12.5, my guests kernel-panic immediately after bootup -- the OOM
        killer kills every process on the system and then dies itself.

        This problem only occurs if I enable the virtio-balloon driver --
        without it, the guests run just fine. Also, this does not happen on
        CentOS guests, which also run fine and which balloon up/down
        happily.

        The problem occurs just after the system gives me a getty -- if I
        have the guest consoled, I'll see a login prompt but never get a
        chance to use it.

        I've tried compiling a vanilla kernel on an ubuntu guest, but the
        problem persisted. I'm not sure where to go from here, so any tips
        on debugging the problem are appreciated.

--Igor

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