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Old 15th February 2010
J65nko J65nko is offline
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Join Date: May 2008
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From http://www.freebsd.org/doc/en_US.ISO...bsdupdate.html

Quote:
Note: The updates distributed via freebsd-update, do not always involve the kernel. It will not be necessary to rebuild your custom kernel if the kernel sources have not been modified by the execution of freebsd-update install.

However, freebsd-update will always update the /usr/src/sys/conf/newvers.sh file. The current patch level (as indicated by the -p number reported by uname -r) is obtained from this file. Rebuilding your custom kernel, even if nothing else changed, will allow uname(1) to accurately report the current patch level of the system.
Conclusion: You do not have to rebuild your custom kernel if the sources have not been updated.

Implication: You have to rebuild your custom kernel if the sources have been updated.
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