Re: [patch 20/23] add /proc/sys/kernel/timeout_granularity

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On Fri, 29 Sep 2006 23:58:39 -0000
Thomas Gleixner <[email protected]> wrote:

> From: Ingo Molnar <[email protected]>
> 
> 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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