SLUB vs SLAB allocator

[Navin Parakkal]

Hi,
 I  found that in many worst case scenarios like fragmention of
allocator , slub performs well than slab.
  I also noticed that Centos /Ubuntu etc switched to SLUB but SLES
still uses SLAB in the default image.

Any particular reason where SLAB is the choice ?


I ask this since i find SLUB to be the default choice since 2.6.23 as
per https://en.wikipedia.org/wiki/SLUB_(software)



Regards,
Navin