Real Time Kernel
Steven Rostedt currently works for Red Hat on their Real Time team. He's the maintainer of the stable releases for the Real Time patch (PREEMPT_RT). He is also one of the original developers for the Real Time patch. Steven brought ftrace to the mainline kernel based on his own tracer and the latency tracer that was part of the Real Time patch. Ftrace has became the official tracer of the Linux kernel, which Steven also currently maintains. He has given numerous talks on the Real Time patch, ftrace, and ktest, the automated testing setup that also resides in the Linux kernel.