linux-kernel - Re: One of these things (CONFIG

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Date:	Wed, 23 Jan 2013 10:48:13 +0530
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	John Stultz <john.stultz@...aro.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Matt Sealey <matt@...esi-usa.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Ben Dooks <ben@...tec.co.uk>, Ingo Molnar <mingo@...hat.com>,
	Linux ARM Kernel ML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: One of these things (CONFIG_HZ) is not like the others..

On Wednesday 23 January 2013 03:22 AM, Tony Lindgren wrote:
> * John Stultz <john.stultz@...aro.org> [130122 11:02]:
>>
>> Correct, with HRT, we actually trigger the HZ-frequency timer tick
>> from an hrtimer (which expires based on the system time driven by
>> the clocksource). Thus even if there is a theoretical error between
>> the ideal HZ and what the hardware can do, that error will not
>> propagate forward.
>
> If there's no cumulative error, sounds like the way to go is to select
> HRT for ARM multiplatform builds and set the HZ to 100 then.
>
HIGH_RES_TIMERS are always enabled by default for OMAP as well as
multi-platform build.

Regards,
Santosh
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