kernel配置
配置linux内核选上
1)Device Drivers --->Memory Technology Device (MTD) support --->UBI - Unsorted blockimages --->Enable UBI
2)File systems --->Miscellaneous filesystems --->UBIFS file system support
第二条的内核配置打印输出如下：
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 1117
UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "program"
UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
UBIFS (ubi0:0): FS size: 93073408 bytes (88 MiB, 733 LEBs), journal size 4698112 bytes (4 MiB, 37 LEBs)
UBIFS (ubi0:0): reserved for root: 4396086 bytes (4293 KiB)
UBIFS (ubi0:0): media format: w5/r0 (latest is w5/r0), UUID 9CF794A9-B195-465A-BAA8-21DA249026D3, small LPT model
在此之前一直挂载不上，没有提示错误一直以为内核已经给配置好，少配置了第二项
######start app####
mount ubifs
ubi0: attaching mtd3
ubi0: scanning is finished
ubi0: attached mtd3 (name "app_filesystem", size 100 MiB)
ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
ubi0: good PEBs: 800, bad PEBs: 0, corrupted PEBs: 0
ubi0: user volume: 2, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 2/1, WL threshold: 4096, image sequence number: 78507198
ubi0: available PEBs: 11, total reserved PEBs: 789, PEBs reserved for bad PEB handling: 40
ubi0: background thread "ubi_bgt0d" started, PID 1113