35 lines
1.4 KiB
Plaintext
35 lines
1.4 KiB
Plaintext
$FreeBSD$
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For legal reasons the two active files for using Soft Updates are in
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/usr/src/sys/contrib/softupdates. To enable the feature in your kernel,
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link the files into this directory as follows:
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cd /usr/src/sys/ufs/ffs
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ln -s ../../contrib/softupdates/*.[ch] .
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and add option SOFTUPDATES to your kernel configuration. You should also
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read the copyrights in the sources and the README file in
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/usr/src/sys/contrib/softupdates before enabling this feature to ensure
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that you are acting legally. The stub file provided here is only enough
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to allow the system to function without this option being turned on.
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WARNING: RE-DISTRIBUTING A KERNEL WITH SOFTUPDATES COMPILED IN WITHOUT
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DISTRIBUTING THE SOURCE TO THE _ENTIRE_ KERNEL IS NOT PERMITTED. See the
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copyright on the soft update files, or ../../contrib/softupdates/README
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Once you're running a kernel with soft update support, you need to enable
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it for whichever filesystems you wish to run with the soft update policy.
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This is done with the -n option to tunefs(8) on the UNMOUNTED filesystems,
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e.g. from single-user mode you'd do something like:
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tunefs -n enable /usr
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To permanently enable soft updates on the /usr filesystem (or at least
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until a corresponding ``tunefs -n disable'' is done).
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For more general information on soft updates, please see:
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http://www.ece.cmu.edu/~ganger/papers/CSE-TR-254-95/
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--
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Julian Elischer <julian@freebsd.org>
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