C. Bornträger M. Schwidefsky This paper describes the experiences of the Linuxt on zSeriest team at the IBM Linux Technology Center in upgrading the support for the zSeries platform when migrating from Linux 2.4 to Linux 2.6. In particular, the team’s contributions to supporting the new device model, the redesigned I/O system, and improved memory management are described as well as their collab...