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Mike Hibler authored
Unmount filesystems with the "-n" option so no "sync" is done on the unmount. We are destroying the main filesystem immediately afterward anyway, and the /dev and /dev/fd instances are likewise disposable (the lib/geni directory itself is mounted RO). Up the allowable limit on open files. Apparently we were hitting this in a couple of places when going through the /etc/rc.d scripts and each time resulted in a half second pause. These two tweaks get us from 6+ seconds per jail invocation to under 2 seconds. I think even on a non-trivial script, the savings will be meaningful.
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