After a two-year hiatus, journalist and developer Jonathan Corbet has delivered an updated edition of his annual Kernel Report, this time at the Kernel Recipes conference. In the talk, Corbet surveyed what is happening in the kernel community, how it is dealing with a period of accelerated change, and where development may be heading. A recording of the presentation is available online.
Among the most prominent themes was the ongoing integration of the Rust programming language into the kernel. Corbet characterised Rust adoption as a strategic commitment rather than a passing experiment, driven by the language's inherent memory safety properties. The promise is to reduce classes of vulnerabilities that have long plagued kernel subsystems, particularly in drivers. At the same time, the report acknowledged the challenge this introduces: kernel maintainers now need fluency in both C and Rust, adding complexity to code review and long-term maintenance.
Corbet also outlined a shift in the kernel's security philosophy, moving from a reactive posture focused on patching toward architectural hardening. This involves proactively designing and fortifying subsystems, including legacy code, against an expanding attack surface driven by the kernel's deployment across an increasingly diverse range of hardware and platforms.
Two technical developments highlighted in the report underscore the community's drive for innovation alongside stability. The first is sched_ext, a mechanism that allows pluggable CPU scheduling policies to be loaded dynamically, giving administrators the ability to tailor scheduling behaviour to specific workload characteristics without rebuilding the kernel. The second is the maturation of Bcachefs, a modern copy-on-write filesystem that now offers a feature set competitive with established options such as Btrfs and XFS, including built-in compression, snapshots, and scalability for storage-heavy use cases.
Beyond the technical, Corbet emphasised that community health itself constitutes critical infrastructure. As the codebase grows more complex — including through multi-language support — the report stressed the importance of governance, coordination, and mentorship in sustaining the project's long-term viability.
The Kernel Report 2026 offers a clear signal to infrastructure teams: the kernel community is deliberately accelerating the pace of foundational change in areas such as language choice, security architecture, and storage technology. For those tasked with maintaining Linux systems, the report suggests that keeping pace with these developments is no longer optional but a practical necessity for secure and resilient operations.
時隔兩年，記者兼開發者Jonathan Corbet在其年度《內核報告》中發表了最新版本，這次是在Kernel Recipes大會上進行。在演講中，Corbet概述了內核社群的現況、如何應對加速變革的時期，以及未來發展方向。演講錄影已在網上公開。
演講中最突出的主題之一是Rust程式語言與內核的持續整合。Corbet將Rust的採用定性為一項策略性承諾，而非曇花一現的實驗，其動力來自該語言固有的記憶體安全特性。其承諾是減少長期以來困擾內核子系統的各類漏洞，尤其是驅動程式方面。同時，報告亦承認這帶來的挑戰：內核維護者現需熟練掌握C及Rust兩種語言，增加了程式碼審查及長期維護的複雜度。
Corbet亦闡述了內核安全理念的轉變，由專注於補丁修復的被動模式，轉向架構層面的強化。這涉及主動設計並加固各子系統，包括傳統程式碼，以應對因內核部署於日益多元的硬體及平台而擴大的攻擊面。
報告中強調的兩項技術發展，凸顯了社群在追求創新之餘兼顧穩定的決心。首先是sched_ext，一種允許動態載入可插拔CPU排程策略的機制，讓管理員無需重新編譯內核即可根據特定工作負載特性調整排程行為。其次是Bcachefs的成熟，這是一款現代的寫時複製檔案系統，現已提供可媲美Btrfs和XFS等既有方案的功能組合，包括內建壓縮、快照及針對大量儲存使用情境的可擴展性。
在技術之外，Corbet強調社群健康本身已構成關鍵基礎設施。隨著程式碼庫因多語言支援等因素日益複雜，報告強調了治理、協調及指導在維繫項目長期可行性方面的重要性。
《內核報告2026》向基礎設施團隊發出明確信號：內核社群正有策略地加速語言選擇、安全架構及儲存技術等基礎領域的變革步伐。報告建議，負責維護Linux系統的團隊，緊跟這些發展已不再是可選項，而是保障安全及韌性運作的實際需要。