[new] — Fpstate Vso

Traditionally, the kernel could assume a fixed size for the floating-point state. However, modern x86 architectures use , where the amount of data saved during a context switch depends on which CPU features (like AVX, AVX-512, or AMX) the application actually uses.

As modern CPUs have evolved from basic x87 floating-point units to advanced vector processing extensions like AVX-512, the "size" of a process's register state has grown significantly. The framework was introduced to handle this "variable" nature of register state efficiently within the kernel. Core Concepts of Fpstate VSO fpstate vso

The kernel manages this through specific APIs and structures defined in headers like linux/fpu.h . Kernel floating-point (Linus Torvalds) - Yarchive Traditionally, the kernel could assume a fixed size