按照ota指南，进行swupdate升级 ,但是kernel可刷新 100%，rootfs没有见到更新，请帮忙指点
root@(none):/sbin#
root@(none):/sbin# ./swupdate_cmd.sh -i /mnt/UDISK/tina-v851s-lizard.swu -e stab
le,upgrade_kernel
config new swupdate
swu_input: ##-i /mnt/UDISK/tina-v851s-lizard.swu -e stable,upgrade_kernel##
## set swupdate_param done ##
swu_param: ##-i /mnt/UDISK/tina-v851s-lizard.swu##
swu_software: ##stable##
swu_mode: ##upgrade_kernel##
###now do swupdate###
###log in /mnt/UDISK/swupdate.log###
## swupdate -v -i /mnt/UDISK/tina-v851s-lizard.swu -e stable,upgrade_kernel ##
Connected to SWUpdate via /tmp/swupdateprog
Update started !
Interface: UNKNOWN
[ ==============================[ 370.488629] ubi0 error: get_exclusive: 2 users for volume 4
[ ------------------------------------------------------------ ] 2 of 2 0% (rootfs)
FAILURE !
Connection closing..
Trying to connect to SWUpdate...
swu_next: ####
swu_param: ##-i /mnt/UDISK/tina-v851s-lizard.swu##
swu_software: ##stable##
swu_mode: ##upgrade_kernel##
###now do swupdate###
###log in /mnt/UDISK/swupdate.log###
## swupdate -v -i /mnt/UDISK/tina-v851s-lizard.swu -e stable,upgrade_kernel ##
Connected to SWUpdate via /tmp/swupdateprog
[ ==============================[ 372.999308] ubi0 error: get_exclusive: 2 users for volume 4
[ ------------------------------------------------------------ ] 2 of 2 0% (rootfs)
FAILURE !
Connection closing..
Trying to connect to SWUpdate...
swu_next: ####
swu_param: ##-i /mnt/UDISK/tina-v851s-lizard.swu##
swu_software: ##stable##
swu_mode: ##upgrade_kernel##
###now do swupdate###
###log in /mnt/UDISK/swupdate.log###
## swupdate -v -i /mnt/UDISK/tina-v851s-lizard.swu -e stable,upgrade_kernel ##
Connected to SWUpdate via /tmp/swupdateprog
[ ==============================[ 375.508322] ubi0 error: get_exclusive: 2 users for volume 4
[ ------------------------------------------------------------ ] 2 of 2 0% (rootfs)
FAILURE !
Connection closing..