linux-kernel - Re: 2.6.21.5 june 30th to july 1st date hang?

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Message-Id: <200707052228.l65MSdvA025440@pasta.boston.redhat.com>
Date:	Thu, 05 Jul 2007 18:28:39 -0400
From:	Ernie Petrides <petrides@...hat.com>
To:	"Chris Friesen" <cfriesen@...tel.com>
cc:	Clemens Koller <clemens.koller@...gramm.de>,
	Chris Wright <chrisw@...s-sol.org>,
	Uli Luckas <u.luckas@...d.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.21.5 june 30th to july 1st date hang?

On Thursday, 5-Jul-2007 at 11:48 MDT, "Chris Friesen" wrote:

> Clemens Koller wrote:
> 
> > Okay, we all survived Y2K and this little glitch. Puh! ;-)
> > Can you please explain in which configuration this problem got triggered.
> 
> As far as I can tell many kernel versions contained the source code bug. 
>   (I'd like some more information on exactly what the problem was if 
> anyone cares to share..the proposed patch didn't give much in the way of 
> specifics.)
> 
> However, in order to trigger the problem you also need to have NTP 
> servers that were erroneously broadcasting the addition of a leap second.
> 
> So most people didn't see the issue because there wasn't supposed to be 
> a leap second added this year...but they would have seen it the next 
> time a leap second was added.

Only kernels built with the CONFIG_HIGH_RES_TIMERS option enabled were
vulnerable.

Cheers.  -ernie
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