Home

How to use

Basics

Checkout the Linux kernel

git clone https://github.com/OpenChannelSSD/linux.git

Configure it to at least include

CONFIG_LIGHTNVM=y
CONFIG_BLK_DEV_NULL_BLK=m
CONFIG_BLK_DEV_NVME=m

Initialize using null_blk driver

Instantiate the module with the following parameters

queue_mode=4 gb=4 nr_devices=1 lightnvm_num_channels=1

That will instantiate the LightNVM driver with a 4GB SSD, with a single channel. You can see that it was instantiated by checking the kernel log.

dmesg |grep lightnvm

where the output should be similar to

[    0.359255] lightnvm: pools: 1
[    0.359773] lightnvm: blocks: 512
[    0.360364] lightnvm: pages per block: 256
[    0.361037] lightnvm: append points: 1
[    0.361663] lightnvm: append points per pool: 1
[    0.362423] lightnvm: timings: 25/500/1500
[    0.363081] lightnvm: target sector size=4096
[    0.363779] lightnvm: disk flash size=4096 map size=4096
[    0.364665] lightnvm: allocated 131072 physical pages (524288 KB)
[    0.365740]  nullb0: unknown partition table`