Hello there, I've been working on adding 'lockless cache' on sl[au]b for a while. But what it actually does is actually adding 'queuing' on slub. So there is a fundamental question coming into my mind: 'is SLAB considered legacy and deprecated?' It seems there are little development on SLAB and people think that SLAB is legacy and deprecated, so CONFIG_SLUB is used by default. But I think both has pros and cons for their own: SLAB: more temporal locality (cache friendly) but high usage of memory, and less spatial locality (TLB misses) than SLUB. SLUB: less temporal locality (less cache friendly) than SLAB but more spatial locality (TLB hit), and low usage of memory and good debugging feature. Why do people say SLAB is deprecated/legacy? Thanks, Hyeonggon
