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    SubjectRe: [PATCH 9/16] 2.6.17-rc6 perfmon2 patch for review: kernel-level API support (kapi)
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    Stephane Eranian <eranian@hpl.hp.com> writes:

    > > > This patch contains the kernel-level API support.
    > > NACK. No one should call this from kernel space.
    >
    > Well, that's what I initially thought too but there is a need from
    > the SystemTap people and given the way they set things up, it is
    > hard to do it from user level. [...]

    Whether one uses systemtap, raw kprobes, or some specialized
    tracing/stats-collecting patch surely forthcoming, kernel-level APIs
    would be needed to perform fine-grained kernel-scope measurements
    using these counters.

    - FChE
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