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2:40 PM Vlastimil Babka wrote: > > @@ -5744,10 +5553,9 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab, > > > > /* > > * Objects left in the slab. If it was not on the partial list before > > - * then add it. This can only happen when cache has no per cpu partial > > - * list otherwise we would have put it there. > > + * then add it. > > */ > > - if (!IS_ENABLED(CONFIG_SLUB_CPU_PARTIAL) && unlikely(was_full)) { > > + if (unlikely(was_full)) { > > This is not really related to your change but I wonder why we check > for was_full to detect that the slab was not on partial list instead > of checking !on_node_partial... They might be equivalent at this point > but it's still a bit confusing. If we only know that a slab is not on the partial list, we cannot manipulate its list because it may be on a linked list that cannot handle list manipulation outside function (e.g., pc.slabs in __refill_objects()). If it's not on the partial list, we can safely manipulate the list only when we know it was full. It's safe because full slabs are not supposed to be on any list (except for debug caches, where frees are done via free_to_partial_list()). -- Cheers, Harry / Hyeonggon