基于uClinux的文件系统裁剪技术的研究与实现

Tailoring uClinux File System for Embedded Systems

从构建基于uClinux的嵌入式系统入手,针对嵌入式设备资源的有限性,在分析VFS文件系统及其所提供的相关系统调用的基础上,对嵌入式uClinux文件系统的裁剪技术进行了研究与探讨.对系统涉及的主要数据结构的简化给出了精确定义,在对文件读写系统调用进行了分析后,给出了系统调用函数集合查找流程,并提出了细粒度裁剪策略.最后以文件系统是嵌入式系统中基本和重要的资源为基点,分析比较了裁剪前后的系统体积,阐明了本裁剪技术的有效性.

Aiming at the challenge of limited resources of embedded devices, the techniques of tailoring the uClinux file system for embedded systems are discussed. Based on analyzing the VFS file system and system calls used in uClinux, the paper presents the simplification of the key system data structure, a finding process of detailed system calls function set, and a fine grained tailoring strategy. The experiments show that it reduces the required storing space significantly when applying the proposed tailoring techniques. The effectiveness of the proposed tailoring techniques is verified.