October 16, 2005
Fiasco-UX Microkernel
前幾天追了 [Fiasco-UX Microkernel]，現在終於在 Debian GNU/Linux 上運作了：
要介紹 Fiasco-UX Microkernel，就必須提到 L4 Microkernel，比較新的作業系統教材應該會提到 L4 的設計 (實在不是我要說，某本封面有恐龍的書籍，似乎一直在 "Concepts" 打轉，好歹介紹一點 L4 這個第二代的 microkernel 吧？)。[Fiasco] 是 L4 v2 與 x0 的具體實作，以 x86 為主要支援的架構，同時擴充性相當高，已經有建構於 Fiasco/L4 基礎上的 Linux / RTLinux multi-server 支援，在網頁上則提到一些重要的資訊：
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Fiasco is a real, second-generation µ-kernel protecting applications in address spaces. Thanks to its efficient task and context switching mechanism and its performace-oriented design, the performance penalties induced by address-space security are neglible - much smaller than in older, first-generation µ-kernels like Mach.
- can be studied and maintained better because it has been written in a high-level language (C++)
- has better real-time properties than L4/x86 because it can be preempted at almost any time
- is freely redistributable under the GPL
Motivation
The original L4 µ-kernel for x86 has some shortcomings which we intend to fix with this new implementation. The Fiasco kernel:
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