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Date: Mon, 9 Feb 2004 15:30:21 +0100
From: Jilles Tjoelker <jilles@stack.nl>
To: Kris Kennaway <kris@obsecurity.org>
Message-ID: <20040209143021.GA29961@stack.nl>
References: <20040209023821.GA30092@xor.obsecurity.org>
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cc: current@FreeBSD.org
Subject: Re: Reproducible "calcru: negative time ..." on SMP system
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On Sun, Feb 08, 2004 at 06:38:21PM -0800, Kris Kennaway wrote:
> I discovered that on a 5.2-BETA SMP system I can cause

> Feb  8 18:29:32 <kern.crit> bento kernel: calcru: negative time of 6816 usec for pid 50286 (grep)
> Feb  8 18:29:41 <kern.crit> bento kernel: calcru: negative time of 7308 usec for pid 51007 (grep)
> Feb  8 18:30:41 <kern.crit> bento kernel: calcru: negative time of 6104 usec for pid 54944 (grep)
> Feb  8 18:30:42 <kern.crit> bento kernel: calcru: negative time of 5933 usec for pid 54962 (grep)

> by running a shell script that does lots of greps, and leaning on the
> ^T key in the shell to send the process lots of SIGINFOs.

This may be the same as kern/52490: ^T'ing a zombie causes calcru() to
be called on a zombie which prints the negative time message.

-- 
Jilles Tjoelker