CXL: Boot To Bash

Overview

CXL on Linux: Boot To Bash

Device Reference

Overview
Devices Types
UEFI Data

Platform Configuration

Overview
EFI Configuration Process
ACPI Tables
Example Platform Configurations

Linux Kernel Configuration:

Overview
Linux Init (Early Boot)
CXL Driver Operation
DAX Driver Operation
Memory Hotplug

Memory Allocation

DAX Devices
The Page Allocator
Reclaim
Memory Tiering
Huge Pages

Use Cases

Memory Expansion
Dynamic Capacity
Virtual Machines
Shared Memory

CXL: Boot To Bash

Memory Tiering
Edit on GitHub

Memory Tiering

todo

Memory Tiers

todo

Transparent Page Placement

todo

Data Access MONitor

to be updated

References

Self-tuned Memory Tiering RFC prototype and its evaluation
SK Hynix HMSDK Capacity Expansion
kernel documentation
project website

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© Copyright 2025, Gregory Price.

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