When using DB2 on Linux for S/390 with a 2.2 series kernel, the amount of available RAM on the Linux machine should be limited to less than 1 GB. Limiting the RAM to 1 GB will avoid possible data loss in DB2 due to a Linux kernel bug.
This only affects DB2 on Linux for S/390 and not Linux on Intel.
A kernel patch will be made available at the IBM developerworks site, after which it will be possible to use more than 1 GB of RAM.