Post Syndicated from original https://lwn.net/Articles/918344/

The kernel project tries hard to avoid duplicating functionality within its
code base; whenever possible, a single subsystem is made to serve all use
cases. There is one notable exception to this rule, though: there are
three object-level memory allocators (“slab allocators”) in the kernel.
The desire to reduce the count has been growing stronger over the years,
and some steps have been taken in 6.2 to eliminate the least-loved
allocator — SLOB — in the relatively near future.