File: //proc/thread-self/root/proc/fs/ext4/xvda1/mb_groups
#group: free frags first [ 2^0 2^1 2^2 2^3 2^4 2^5 2^6 2^7 2^8 2^9 2^10 2^11 2^12 2^13 ]
#0 : 28511 2 4249 [ 1 1 1 1 1 0 1 0 1 1 1 1 0 3 ]
#1 : 6816 16 1832 [ 10 5 9 7 7 6 6 7 8 2 0 1 0 0 ]
#2 : 13791 9 3124 [ 3 4 5 6 3 3 4 4 4 5 1 2 1 0 ]
#3 : 12290 4 129 [ 2 2 1 3 2 2 2 2 2 2 2 2 1 0 ]
#4 : 24576 1 8192 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 3 ]
#5 : 32639 1 129 [ 1 1 1 1 1 1 1 0 1 1 1 1 1 3 ]
#6 : 32768 1 0 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 4 ]
#7 : 32639 1 129 [ 1 1 1 1 1 1 1 0 1 1 1 1 1 3 ]