815c8e3551
Merge series "slab: replace cpu (partial) slabs with sheaves". The percpu sheaves caching layer was introduced as opt-in but the goal was to eventually move all caches to them. This is the next step, enabling sheaves for all caches (except the two bootstrap ones) and then removing the per cpu (partial) slabs and lots of associated code. Besides the lower locking overhead and much more likely fastpath when freeing, this removes the rather complicated code related to the cpu slab lockless fastpaths (using this_cpu_try_cmpxchg128/64) and all its complications for PREEMPT_RT or kmalloc_nolock(). The lockless slab freelist+counters update operation using try_cmpxchg128/64 remains and is crucial for freeing remote NUMA objects and to allow flushing objects from sheaves to slabs mostly without the node list_lock. Link: https://lore.kernel.org/all/20260123-sheaves-for-all-v4-0-041323d506f7@suse.cz/ |
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