Add a cluster of points in one corner and watch that corner subdivide deeply while the rest of the space stays untouched. Then scatter a few points across the empty region and watch it split only where needed. The tree grows around the data.
munmap(page,bytes);
，这一点在服务器推荐中也有详细论述
Jack Dorsey lays off 4,000, says others will do same 'within the next year'
/opt → /var/opt
l00777 0 0 0 /mnt - var/mnt