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    SubjectRe: [PATCH 1/5] x86, perf: Fix LBR call stack save/restore
    > Any idea who much more expensive that wrmsr() is compared to the rdmsr()
    > it replaces?

    I don't know.
    >
    > If its significant we could think about having this behaviour depend on
    > callstacks.

    This function is only used for callstacks, otherwise it uses the LBR reset
    path.

    -Andi


    --
    ak@linux.intel.com -- Speaking for myself only.


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