open-cas-linux/utils/ext4-config.csv

1	IO class id	IO class name	Eviction priority	Allocation
2	0	Unclassified	23	1
3	1	Superblock	0	1
4	2	GroupDesc	1	1
5	3	BlockBitmap	2	1
6	4	InodeBitmap	3	1
7	5	Inode	4	1
8	6	IndirectBlk	5	1
9	7	Directory	6	1
10	8	Journal	7	1
11	9	Extent	8	1
12	10	Xatrr	9	1
13	11	<=4KiB	10	1
14	12	<=16KiB	11	1
15	13	<=64KiB	12	1
16	14	<=256KiB	13	1
17	15	<=1MiB	14	1
18	16	<=4MiB	15	1
19	17	<=16MiB	16	1
20	18	<=64MiB	17	1
21	19	<=256MiB	18	1
22	20	<=1GiB	19	1
23	21	>1GiB	20	1
24	22	O_DIRECT	21	1
25	23	Misc	22	1