A professional Linux technology community and learning platform covering the kernel, memory management, process management, file system and I/O, performance tuning, device drivers, virtualization, and cloud computing.
This guide explains how to leverage eBPF’s Kprobe, Tracepoint, and LSM features to audit file read/write activity, extract process and file details, and optionally block operations using helpers like bpf_send_signal or bpf_override_return, with complete code examples and configuration steps.
The article explains how attackers exploit SUID binaries for privilege escalation and demonstrates how to use eBPF LSM hooks (file_open, bprm_check_security) and Kprobe tracing to audit such operations, then shows how to block them by returning error codes while exempting root users.
The article explains the evolution from segment to paging addressing, details Linux’s multi‑level page‑table structures for x86 and ARM, walks through key macros and assembly routines, and provides a complete kernel module example that translates a virtual address to its physical counterpart.
This article explains DMA fundamentals, compares Block DMA and Scatter‑Gather DMA step by step, and evaluates the open‑source RIFFA PCIe framework, including its hardware flow, software components, board‑level performance tests, features, drawbacks, and licensing terms.
The article examines DARPA's TRACTOR project, which aims to use large‑language‑model AI to automatically translate legacy C and C++ code into safe Rust, discusses the memory‑safety motivations, technical challenges, community reactions, and the broader push by US agencies to abandon unsafe languages.
This article explains the acoustic fundamentals, key components, and design processes of automotive audio systems, covering basic sound effects, active sound generation, noise‑cancellation technologies, and the computational and latency constraints that shape audio routing and mixing strategies.
The article speculates why the RISC‑V integer ISA does not define a multiply‑accumulate (MAC) instruction, examining how such an instruction would affect integer‑unit micro‑architecture, decoder width, rename complexity, and OoO window size, and compares these trade‑offs with ARM and Apple M1 designs.
This article introduces the acoustic fundamentals, human hearing characteristics, sound‑localization experiments, and detailed specifications of microphones, speakers, amplifiers, and domain controllers that form the basis of an intelligent‑cockpit audio subsystem.
Zephyr RTOS 3.7.0 LTS was released on July 26, 2024, introducing over 650 contributors, new hardware models, expanded POSIX and Bluetooth support, numerous API changes, extensive driver updates, enhanced networking features, and a series of security patches covering multiple CVEs.
The openEuler 24.03 LTS release introduces a dynamic composite page (large folio) that retains 4 KB base‑page compatibility while enabling 64 KB page performance gains, reducing TLB misses and memory overhead, and delivering double‑digit benchmark improvements for big‑data, Kafka, MySQL, I/O and memory‑allocation workloads.
