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Date: Wed, 31 Oct 2001 19:35:47 +0100 (CET)
From: Tim Schmielau <tim@physik3.uni-rostock.de>
To: "Richard B. Johnson" <root@chaos.analogic.com>
cc: vda <vda@port.imtp.ilyichevsk.odessa.ua>, <linux-kernel@vger.kernel.org>
Subject: Re: [Patch] Re: Nasty suprise with uptime
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Sorry, I forgot to set INITIAL_JIFFIES to zero before posting the patch.

Testing with high INITIAL_JIFFIES values unfortunately still discloses
instability after the wraparound even for an otherwise unpatched kernel.

I also forgot to mention that the introduced jiffies_high variable is
useless on 64 bit systems, so we might #ifdef it out there.

Tim


On Wed, 31 Oct 2001, Tim Schmielau wrote:

[parts of patch snipped]

> --- kernel/timer.c.orig	Wed Oct 31 17:24:36 2001
> +++ kernel/timer.c	Wed Oct 31 18:38:47 2001
> @@ -65,7 +65,9 @@
>
>  extern int do_setitimer(int, struct itimerval *, struct itimerval *);
>
> -unsigned long volatile jiffies;
> +#define INITIAL_JIFFIES 0xFFFFD000ul
> +unsigned long volatile jiffies = INITIAL_JIFFIES;
> +unsigned long volatile jiffies_high, jiffies_high_shadow;
>

This of course needs to be
   #define INITIAL_JIFFIES 0
for correct uptime display

-
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