https://sankethbk.github.io/blog/tags/tlb/Recent content in Tlb on Sanketh's BlogHugo -- 0.163.3en-usThu, 02 Jul 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/operating-systems/linux/2026-07-02-page-tables/Thu, 02 Jul 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/operating-systems/linux/2026-07-02-page-tables/<h2 id="modern-linux-page-tables-4-level-architecture">Modern Linux Page Tables (4-Level Architecture)</h2> <p>Modern 64-bit processors require much larger address spaces, and the Linux kernel adapted by shifting to a <strong>4-level</strong> (and more recently, a 5-level) page table architecture.</p> <p><strong>The Core Concept:</strong> Because a 64-bit address space is astronomically large and mostly empty, the kernel cannot use a single, massive translation array. Instead, it uses a hierarchical, multi-level tree of tables to map Virtual Addresses to Physical Addresses efficiently.</p>