About Caches

• Generally, the VFS attempts to keep caches of objects, because:
  1. Allocating objects (memory) takes time.
  2. Resolving objects takes time.
• So for each object type the VFS holds:
  1. A list of used (i.e. may NOT be deleted) objects.
  2. A list of resolved but un-used (i.e. recently resolved but may be deleted) objects.
  3. A list of un-assigned and un-used (i.e. completely free) objects - by using SLAB caches.

Originally written by guy keren