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    SubjectRe: perf hw in kexeced kernel broken in tip
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    On Wed, 2010-12-08 at 10:43 -0800, Yinghai Lu wrote:
    > can you add sth force_... in command line to take over ownership of
    > perf from BIOS or previous kernel ?

    The problem is, you cannot steal the thing from the BIOS, you'll trample
    on its settings and the next time it runs it will simply re-instate it.

    And aside from probing the EN bit on boot there is no way of determining
    this.

    So forcing the state might get you an ill-functioning system.

    > then still can use perf etc after we kexec from RHEL or SLES kernel to
    > later kernel ( from 2.6.37)

    I'm not sure why people would do that, but yeah I guess we can do
    something like that.


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