File system panic on recent HEAD

[Matthew Dillon]

:	hammer -t 600 -c /var/db/reblock-build.cycle reblock-inodes /build 100
:	hammer -t 600 -c /var/db/reblock-build.cycle reblock-btree /build 100
:	hammer -t 600 -c /var/db/reblock-build.cycle reblock-data /build 95

    Sorry, I messed up that example.  The cycle file stores the object id
    the scan stopped at after reaching the timeout, so it can pick up from
    that point the next time.  Each type of reblocking scan should use a
    different file, so:

	hammer -t 600 -c /var/db/reblock-build1.cycle reblock-inodes /build 100
	hammer -t 600 -c /var/db/reblock-build2.cycle reblock-btree /build 100
	hammer -t 600 -c /var/db/reblock-build3.cycle reblock-data /build 95

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>