From owner-freebsd-hackers@FreeBSD.ORG  Fri Nov 14 22:03:08 2003
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Date: Fri, 14 Nov 2003 22:02:51 -0800 (PST)
From: Don Lewis <truckman@FreeBSD.org>
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Subject: Re: New complaints
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On 14 Nov, M. Warner Losh wrote:
> checking stopevent 2 with the following non-sleepable locks held:
> exclusive sleep mutex sigacts r = 0 (0xc48c5aa8) locked @ kern/subr_trap.c:260
> checking stopevent 2 with the following non-sleepable locks held:
> exclusive sleep mutex sigacts r = 0 (0xc48c5aa8) locked @ kern/subr_trap.c:260
> 
> Lots and lots of these (thousands) when I login.  pwd causes this.
> This is as of 0230 UTC Nov 15, 2003.  Yesterday's kernel (2300 UTC Nov
> 13, 2003), on a different machine, doesn't seem to have this problem.
> 
> Is anybody else seeing this?

There have been an number of reports of this earlier today.  I just
upgraded and got bit by it as, too.  The culprit is sys/sys/proc.h
1.359.