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Date: Mon, 17 Feb 2003 15:23:00 +0100 (CET)
From: Tim Schmielau <tim@physik3.uni-rostock.de>
To: Matti Aarnio <matti.aarnio@zmailer.org>
cc: =?iso-8859-1?Q?J=F6rn?= Engel <joern@wohnheim.fh-wedel.de>,
       Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>,
       lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH *] use 64 bit jiffies
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On Mon, 17 Feb 2003, Matti Aarnio wrote:

> This will store constants into  jiffies_msb_flips:
> ("1" for DEBUG_JIFFIESWRAP, "0" otherwise.)
> Wouldn't zero be what will always be needed ?

No - this is exactly what is intended. Note that jiffies_msb_flips counts
flips of the MSB of jiffies, i.e., it's LSB should always be equal to the
MSB of jiffies.
We use it as a measure of whether jiffies_msb_flips is still up to date -
when the msb of jiffies flip, we have 2^31/HZ seconds to detect that
in the timer routine.

Tim

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