On Fri, 25 Apr 2025, Vlastimil Babka wrote: > @@ -4195,7 +4793,11 @@ static __fastpath_inline void *slab_alloc_node(struct > kmem_cache *s, struct list > if (unlikely(object)) > goto out; > > - object = __slab_alloc_node(s, gfpflags, node, addr, orig_size); > + if (s->cpu_sheaves && node == NUMA_NO_NODE) > + object = alloc_from_pcs(s, gfpflags);
The node to use is determined in __slab_alloc_node() only based on the memory policy etc. NUMA_NO_NODE allocations can be redirected by memory policies and this check disables it. > @@ -4653,7 +5483,10 @@ void slab_free(struct kmem_cache *s, struct slab > *slab, void *object, > memcg_slab_free_hook(s, slab, &object, 1); > alloc_tagging_slab_free_hook(s, slab, &object, 1); > > - if (likely(slab_free_hook(s, object, slab_want_init_on_free(s), false))) > + if (unlikely(!slab_free_hook(s, object, slab_want_init_on_free(s), > false))) > + return; > + > + if (!s->cpu_sheaves || !free_to_pcs(s, object)) > do_slab_free(s, slab, object, object, 1, addr); > } We free to pcs even if the object is remote?
