Linux 4.15 I/O Scheduler Tests: BFQ, CFQ, Kyber

Linux 4.15 I/O Scheduler Tests: BFQ, CFQ, Kyber: With some BFQ performance fixes included as part of Linux 4.15 along with other I/O scheduler work and block improvements for this latest Linux kernel series, here are some fresh benchmarks of the different I/O scheduler options using the Linux 4.15 Git kernel.