Jens Axboe is a Linux kernel hacker. He is the current Linux kernel maintainer of the block layer and other block devices, along with contributing the CFQ I/O scheduler and splice (system call) IO architecture. Jens is also the author of the blktrace utility and kernel parts, which provides a way to trace every block IO activity in the Linux kernel. blktrace exists in 2.6.17 and later linux kernels. Wikipedia
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