root@ubuntu:~# sudo flashcache_create -p back cachedev /dev/nvme0n1 /dev/sdb1
cachedev cachedev, ssd_devname /dev/nvme0n1, disk_devname /dev/sdb1 cache mode WRITE_BACK
block_size 8, md_block_size 8, cache_size 0
Flashcache metadata will use 4098MB of your 16152MB main memory
Proportion of main memory needed for flashcache metadata is high.
You can reduce this with a smaller cache or a larger blocksize.
Are you sure you want to proceed ? (y/n): y

modprobe: FATAL: Module flashcache not found.
Could not load Flashcache Module

系统是Ubuntu 15.04 LE版本
apt-get install flashcache-dkms
apt-get install flashcache-utils
这2货已经都安装了。大神知道这报错怎么解决吗？

sudo modprobe flashcache

还是提示这个怎么破