Description of Problem: swapoff -a will sometimes return without unmounting any swap swapoff against partitions/files will unmount those particular files/partitions. When everything is unmounted, swapon -a will restore the system At the moment I don't have a reproducible test case, but am working to find one.
Need a reproducible test case...
This has reportedly been fixed in the version of mount which shipped with 7.2 (mount-2.11g-5). The problem has not been reported since this upgrade.