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    SubjectRe: [patch 20/23] add /proc/sys/kernel/timeout_granularity
    On Fri, 29 Sep 2006 23:58:39 -0000
    Thomas Gleixner <tglx@linutronix.de> wrote:

    > From: Ingo Molnar <mingo@elte.hu>
    >
    > Introduce timeout granularity: process timer wheel timers every
    > timeout_granularity jiffies. Defaults to 1 (process timers HZ times
    > per second - most finegrained).
    >
    > ...
    >
    > + timeout_granularity=
    > + [KNL]
    > + Timeout granularity: process timer wheel timers every
    > + timeout_granularity jiffies. Defaults to 1 (process
    > + timers HZ times per second - most finegrained).
    > +

    Please do not expose HZ to userspace in this fashion. It means that an
    application which was developed and tested on a 1000Hz kernel might fail on a
    250Hz kernel.

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