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Date: Sun, 29 Mar 2009 11:32:25 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Wenji Wu <wenji@fnal.gov>
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Cc: freebsd-current@freebsd.org
Subject: Re: LOCK_PROFILING does not work on FreeBSD 8.0-CURRENT
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Wenji Wu wrote:
>> It certainly does work in 8.0.  Is it possible you forgot to install 
>> the 
>> rebuilt kernel?
> 
> I have rebuilt everything (rebuild the world), just does not work for me. But if it works for you, i will retry to see what is going on.

Rebuilding the kernel (or world) only prepares a new version, it doesn't 
reinstall it.  Unless you ran a separate 'make installkernel' you are 
still running the old kernel.  You can confirm by looking at uname -a 
and checking the time when the running kernel was compiled.

Kris