On Thu, 7 Dec 2017, Kees Cook wrote: > > These SLAB config options are only used for testing so this is ok. > > Most systems use SLUB so I can't say how common CONFIG_DEBUG_SLAB is. > (Though, FWIW with SLUB, CONFIG_SLUB_DEBUG is very common.)
CONFIG_SLUB_DEBUG is on by default because it compiles into the kernel the runtime configurable debugging framework. It does not activate any debugging. CONFIG_SLUB_DEBUG_ON is the equivalent to CONFIG_SLAB_DEBUG. The kernel will boot with debugging on without any extra kernel options with these.
