The transition to a variable state object model was a major rework for the Linux kernel to support high-performance computing needs:
The kernel manages this through specific APIs and structures defined in headers like linux/fpu.h . Kernel floating-point (Linus Torvalds) - Yarchive fpstate vso
The fpstate is the actual in-memory copy of all FPU registers saved and restored during context switches. If a task is actively using the FPU, the registers on the CPU are more current; when the kernel switches tasks, it saves those registers into the fpstate buffer. Importance in the Linux Kernel The transition to a variable state object model
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. Importance in the Linux Kernel Traditionally, the kernel