So, buddy allocator is used to solve external fragmentation. But itself
has internal fragmentation problem. Slab allocator is built on top of
buddy allocator, and solves the internal fragmentation caused by buddy
allocator. Is my undersanding right?
I'm reading the book you mentationed. That's where I got confused. I
have read that part: there are two sets of caches, one for normal use,
another one for DMA. What I can't understand is how the slab allocator
overcome the internal fragmentation caused by buddy allocator.
Thanks!!!
Fei
