1config FS_JFFS2 2 bool "Enable JFFS2 filesystem support" 3 help 4 This provides support for reading images from JFFS2 (Journalling 5 Flash File System version 2). JFFS2 is a log-structured file system 6 for use with flash memory devices. It supports raw NAND devices, 7 hard links and compression. 8 9config JFFS2_LZO 10 bool "Enable LZO compression in JFFS2" 11 depends on FS_JFFS2 12 help 13 Enable LZO compression in the JFFS2 filesystem 14 15config JFFS2_NAND 16 bool "Enable JFFS2 support for NAND flash" 17 depends on FS_JFFS2 18 help 19 Enable support for NAND flash as the backing store for JFFS2. 20 21config SYS_JFFS2_SORT_FRAGMENTS 22 bool "Enable JFFS2 sorting of filesystem fragments (SLOW!)" 23 depends on FS_JFFS2 24 help 25 If you boot from a partition which is mounted writable, and you 26 update your boot environment by replacing single files on that 27 partition, you should also define CONFIG_SYS_JFFS2_SORT_FRAGMENTS. 28 Scanning the JFFS2 filesystem takes *much* longer with this feature, 29 though. Sorting is done while inserting into the fragment list, 30 which is more or less a bubble sort. That algorithm is known to be 31 O(n^2), thus you should really consider if you can avoid it! 32