linux-kernel - Re: [patch-mm] dynticks: Fix one off jiffy update

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Message-ID: <20070131131058.GA25445@elte.hu>
Date:	Wed, 31 Jan 2007 14:10:58 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andrew Morton <akpm@...l.org>,
	Karsten Wiese <fzu@...gehoertderstaat.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch-mm] dynticks: Fix one off jiffy update


* Thomas Gleixner <tglx@...utronix.de> wrote:

> Sigh. /me wanted to be too clever and needs to order more brown 
> paperbags now.
> 
> The rework of the jiffy update code introduced a one off error, which 
> led to a one off accounting error for last_jiffy_update. This made 
> jiffies lag behind.
> 
> Noticed by Karsten Wiese (cpufreq_ondemand weirdness).

Karsten - thanks for tracking this regression down to the jiffies update 
code! I'm wondering, do you still the suspend slowness problem with this 
fix applied as well?

	Ingo
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