From xarray to Swap Table: Streamlining Linux Swapcache Management

The article analyzes how the newly introduced swap table replaces the kernel's xarray for swapcache, offering O(1) lookups, better locality, reduced lock contention, and lower memory overhead, with benchmark results showing notable performance gains in real workloads.

Linux kernelMemory Managementswap table

0 likes · 11 min read

From xarray to Swap Table: Streamlining Linux Swapcache Management

Linux Code Review Hub

Sep 6, 2025 · Fundamentals

From xarray to Swap Table: Redesigning Linux Swapcache for Speed and Simplicity

The article analyzes the new swap table implementation that replaces the kernel's xarray‑based swapcache with a per‑cluster array, offering O(1) lookups, reduced lock contention, lower memory overhead, and measurable performance gains demonstrated by real‑world benchmarks.

Linux kernelMemory ManagementPerformance

0 likes · 11 min read

From xarray to Swap Table: Redesigning Linux Swapcache for Speed and Simplicity