Daredevil: Rescue Your Flash Storage from Inflexible Kernel Storage Stack

Existing kernel storage stacks for NVMe SSDs struggle to address performance interference between I/O requests from tenants with different SLAs, leading to the multi-tenancy issue. Addressing this requires separating their I/O requests within the NVMe I/O queues (NQs). However, our analysis reveals that the static CPU core-NQ bindings of current storage stacks restrict their flexibility to achieve this goal.