Introduction - If you have any usage issues, please Google them yourself
Linux partners algorithm all the free page is divided into 10 blocks of groups, each group in the block size is two power-of-pages, for example, the first group in the 0 block size is 20 (one page), the first a block size of the group are 21 (2 pages), 9 blocks the size of the group are 29 (512 pages). In other words, each group in the block size is the same, and the same size to form a linked list of blocks