From owner-cvs-src@FreeBSD.ORG  Fri Jul 18 13:18:40 2003
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Date: Fri, 18 Jul 2003 16:18:31 -0400 (EDT)
From: Jeff Roberson <jroberson@chesapeake.net>
To: Mike Makonnen <mtm@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/kern kern_umtx.c
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On Fri, 18 Jul 2003, Mike Makonnen wrote:

> mtm         2003/07/18 10:58:37 PDT
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/kern             kern_umtx.c
>   Log:
>   Move the decision on whether to unset the contested
>   bit or not from lock to unlock time.
>
>   Suggested by:   jhb
>
>   Revision  Changes    Path
>   1.9       +40 -48    src/sys/kern/kern_umtx.c
>

I assume this fixes some race?  Can you describe the scenario?