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Date: Sun, 22 Aug 2004 00:18:49 -0400 (EDT)
From: Robert Watson <rwatson@FreeBSD.org>
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To: Brian Fundakowski Feldman <green@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/vm vm_fault.c
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On Sun, 22 Aug 2004, Brian Fundakowski Feldman wrote:

> Also, it was the system_map lock, so it was a mutex, not an sx. 
> 
> /Goes back to trying to figure out wtf portupgrade -rR kde\* keeps
> causing
>  hangs, but only in X, not at the command line, and not seemingly
>  dependant on AGP/X driver. 

I believe mutexes are alright also as long as you're careful about
sleeping and lock order.  I.e., don't sleep while holding a
non-funnel-like mutex, etc.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Principal Research Scientist, McAfee Research