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    SubjectRe: [perfmon] Re: [perfmon2] perfmon2 merge news
    From: Paul Mackerras <>
    Date: Thu, 15 Nov 2007 12:11:10 +1100

    > The third (hard to extend cleanly) is a good point, and is a valid
    > criticism of the current set of perfmon2 system calls, I think.
    > However, the goal of being able to extend the interface tends to be in
    > opposition to the goal of having strong typing of the interface.
    > Things like a multiplexed syscall or an ioctl are much easier to
    > extend but that is at the expense of losing strong typing.

    I disagree.

    With netlink we can just add new attributes when a new need arises for
    a particular interface. The attribute code describes the type
    precisely, so there is no loss of strong typing at all.
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