Date: Sat, 21 Jan 2006 12:47:09 -0800
From: Andrew Morton <akpm@osdl.org>
To: Knut Petersen <Knut_Petersen@t-online.de>
Cc: linux-kernel@vger.kernel.org, torvalds@osdl.org
Subject: Re: [BUG] Timer subsystem broken for Pentium M / early XEON / P6
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Message-Id: <20060121124709.28756a2d.akpm@osdl.org>
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Knut Petersen <Knut_Petersen@t-online.de> wrote:
>
> Obviously printk time jumps. But it is also inaccurate compared against 
>  system time: 10:33:18 is
>  1116 seconds after 10:14:42, and so the printk time at 10:33:18 should 
>  be 1260+1116==2376 and not 2362.
>  That means printk time lost 14 seconds against system time in less that 
>  20 Minutes.

printk-time is really just a debugging/development thing - it doesn't try
to be serious.

We _could_ use some more accurate time function for this, but most of them
take locks, and taking locks inside printk isn't a great idea.

Plus syslogd already adds timestamps.
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