Linux

Illustration of two processes sharing memory pages with copy‑on‑write.

How Copy-on-Write Pages Prevent Fork from Exhausting Memory

A deep dive into the mechanics of copy‑on‑write pages and why they keep forked processes from blowing up system memory.

Diagram of a Linux cgroup hierarchy with v2 unified tree.

Why Cgroups V2 Redefined Modern Linux Resource Isolation

Cgroups v2 unifies the control hierarchy, introduces granular I/O and memory throttling, and simplifies container orchestration, making Linux resource isolation more predictable and efficient.

Illustration of a low-level lock mechanism in code.

Building Userland Mutexes with the Futex System Call

A deep dive into constructing efficient mutexes in user space with futex, complete with code examples and best practices.

Diagram of Linux cgroups hierarchy with v2 overlay.

How cgroups v2 Redefines Resource Isolation Boundaries

cgroups v2 unifies memory, CPU, and I/O controls under a single hierarchy, simplifying container orchestration and improving predictability.

Illustration of kernel memory zones and object caches.

Where the Kernel Hides Its Object Caches

A deep dive into Linux kernel object caches, their implementation, location, inspection tools, and tuning tips.