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Allocators

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Slab

Linux kernel variants

  • SLAB: The original. From the Kconfig help:
    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.
  • SLUB (Christoph Lameter, 2007) reduced the size of the slab object queue and improved scalability for many processors (LKML). From the Kconfig help:SLUB is a slab allocator that minimizes cache line usage instead of managing queues of cached objects (SLAB approach). Per cpu caching is realized using slabs of objects instead of queues of objects. SLUB can use memory efficiently and has enhanced diagnostics. SLUB is the default choice for a slab allocator.
  • SLQB (Nick Piggin, 2008)
  • SLOB (LKML)
  • Differences between SL*Bs