Daredevil: Rescue Your Flash Storage from Inflexible Kernel Storage Stack

Junzhe Li; Ran Shu; Jiayi Lin; Qingyu Zhang; Ziyue Yang; Jie Zhang; Yongqiang Xiong; Chenxiong Qian

doi:10.1145/3689031.3717482

EuroSys2025Top-tier venue

Daredevil: Rescue Your Flash Storage from Inflexible Kernel Storage Stack

Junzhe Li, Ran Shu, Jiayi Lin, Qingyu Zhang, Ziyue Yang, Jie Zhang, Yongqiang Xiong, Chenxiong Qian

DOI Publisher

2025Year

2Citations

Abstract

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.

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