Deprecated and scheduled for removal in a few cycles. Replaced by
SLUB.

If you cannot migrate to SLUB, please contact linux-mm@kvack.org
and the people listed in the SLAB ALLOCATOR section of MAINTAINERS
file, explaining why.

The regular slab allocator that is established and known to work
well in all environments. It organizes cache hot objects in
per cpu and per node queues.