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    SubjectRe: KVM timekeeping fixes, V2
    On 07/16/2010 10:26 PM, Joerg Roedel wrote:
    > On Fri, Jul 16, 2010 at 07:20:32AM -1000, Zachary Amsden wrote:
    >
    >
    >> I've been very careful to keep nested SVM safe, but I've not got a good
    >> test for that. Is there any test suite for the nested case?
    >>
    > To test this you can boot a nested Linux guest and let both, L1 and L2
    > guest use kvm_clock. Then put some load into the L2 guest and see if the
    > L2 or the L1 freezes hard (which happens with kvm_clock when the TSC
    > went backwards for one of them).
    >
    >

    With recent guests, they won't freeze any more, since we detect the tsc
    going backwards and compensate (in a brute-force way, nothing clever).

    But you can printk the maximum compensation and see if it's something
    unreasonable.

    --
    error compiling committee.c: too many arguments to function



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