Reducing an LVM2 Swap Logical Volume

1. Disable swapping for the associated logical volume:

   # swapoff -v /dev/VolGroup00/LogVol01

2. Reduce the LVM2 logical volume by 512 MB:

   # lvreduce /dev/VolGroup00/LogVol01 -L -512M

3. Format the new swap space:

   # mkswap /dev/VolGroup00/LogVol01

4. Activate swap on the logical volume:

   # swapon -v /dev/VolGroup00/LogVol01

5. To test if the swap logical volume was successfully reduced, inspect active swap space:

   $ cat /proc/swaps
   $ free -h