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    SubjectRe: [PATCH/RFC] stop_machine: make stop_machine_run more virtualization friendly
    Christian Borntraeger wrote:
    > I really like 64 guest cpus as a good testcase for all kind of things.

    Sure, I do the same kind of thing.

    >> I think x86 (at least) is now using ticket locks, which is fair. Which
    >> kernel are you seeing this problem on?
    > Sorry, forgot to mention. Its kvm.git from 2 days ago on s390.

    And on s390 cpu_relax yields the vcpu? That's not common behaviour
    across architectures.


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