Abstract
The number of applications of small embedded systems such as PDAs, electronic note books, etc. based on Kinux, have increased. Due to the monolithic characteristic of Linux kernel, it is not suitable to satisfy the various kinds of embedded application requirement. To assist the shortcoming of monolithic kernel, we implement uJFFS 113th file system as an application program process which runs in user space. This solution consists of a file system and a flash device driver, and makes Linux kernel smaller by separating the file system from the kernel. uJFFS consists of ujffs_fs that plays a part of file system and ujffs_drv that controls a flash device. Which provides the same user interface as Linux does. A Device driver for the physical device is implemented in user pace, which prevents kernel failures from file system errors. So uJFFS can increase stability of the system.
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