Ulf has a very long experience of using Linux and has been contributing the Linux kernel development for many years by now. He maintains the MMC subsystem and the generic PM domain in the Linux kernel, but also spends lots of time reviewing various changes related to power management and to their corresponding frameworks.

Moreover, Ulf has a background in real-time and embedded systems. He also has an in-depth knowledge about flash memory technologies, such as NAND and NOR.