Open Source Summit India 2025

Page migration is a vital mechanism in Linux NUMA systems, enabling the movement of memory pages across NUMA nodes to optimize performance and resource utilization.

This session will provide a walkthrough of Linux kernel tracing capabilities, demonstrating live debugging techniques for Linux drivers using a dummy netdev driver. We will explore various kernel debugging facilities and how to infer real-time insights without relying on printk debugging.

A longstanding challenge in Linux has been the inefficiency of the 4KB base page size—while it reduces internal fragmentation, it causes longer LRU lists, more page faults, and more TLB misses. Transparent Huge Pages (THP) mitigate this by dynamically allocating larger pages (2MB).

cgroup v2 is now the default resource management system in modern Linux kernels, container runtimes, and orchestration platforms. Migrating from cgroup v1 to cgroup v2 is essential for improving resource management but migrating from v1 risks potential outages, performance regressions, and hidden legacy dependencies. In this session, we'll provide a concise introduction to cgroups, showing how cgroup v1 evolved into cgroup v2.

A Trusted Execution Environment (TEE) is an isolated execution environment running alongside the rich operating system. It provides the capability to isolate security-critical or trusted code and corresponding resources like memory, devices, etc. The isolation is backed by hardware security features such as Arm TrustZone, AMD Secure Processor, RISC-V TEE, etc.

Auto-instrumentation for native applications—especially in C++ and Rust—is one of the toughest challenges in observability. Unlike managed languages like Java that provide runtimes with built-in instrumentation hooks, or languages like Go that offer limited runtime metadata, native applications expose no dynamic introspection or tracing facilities. This makes traditional approaches ineffective or invasive.

The EFI Development Kit (EDK II) is a powerful and flexible framework is a modern, open-source, cross-platform firmware development environment for the Unified Extensible Firmware Interface (UEFI) essential for modern server platforms.

In this talk, we will explore the Signal messaging system's implementation of the PQXDH (Post-Quantum Extended Diffie-Hellman) Key Agreement Protocol, which establishes a shared secret key between two parties. PQXDH facilitates mutual authentication while preserving cryptographic deniability. We will discuss how PQXDH ensures both privacy and forward secrecy, all while maintaining a protocol design that is straightforward and intuitive. Additionally, we will examine how Signal leverages NIST-approved Post-Quantum Cryptography (PQC) algorithms and Key Encapsulation Mechanisms (KEMs) in the implementation of PQXDH.