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From: Robert Watson <rwatson@FreeBSD.org>
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To: Stefan Bethke <stb@lassitu.de>
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Cc: Attilio Rao <attilio@freebsd.org>,
	"Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>,
	FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: spinlock held too long on reboot
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On Sat, 23 May 2009, Stefan Bethke wrote:

> I've only seen this once.  If I should encounter it again, is there 
> something you'd like me to look at?

I've now seen this twice, both times on SMP VMWare installations.  I theorized 
that perhaps it was because one of the virtual CPUs wasn't time sliced for 
over our spinlock wait threshold due to load in the host OS, but if it's also 
being seen on real hardware it's presumably not that.

Robert N M Watson
Computer Laboratory
University of Cambridge