Date: Tue, 03 Jun 2008 21:59:13 +0200
Message-Id: <303013682@web.de>
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From: devzero@web.de
To: Andrew Morton <akpm@linux-foundation.org>
Cc: User-mode-linux-devel@lists.sourceforge.net, Jeff Dike <jdike@addtoit.com>,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/6] UML - Deal with host time going backwards
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>> Protection against the host's time going backwards - keep track of the
>> time at the last tick and if it's greater than the current time, keep
>> time stopped until the host catches up.
>
>Strange.  What would cause the host's time (or at least UML's perception
>of it) to go backwards?

mhh - what about admin`s/user`s stupidity ?

e.g.

0 * * * *   root  /usr/sbin/ntpdate some.time.server >/dev/null 2>&1

in root`s crontab.

if the hosts`s clock is running faster than clock on some.time.server, this would set host`s clock back in time every hour or so....

common malpractice regarding time-syncronization - have seen that more than once.
(and have to admit that i used that some years ago before i wasn`t aware that ntpd does handle that more intelligent)


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