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Yoo wrote: > On Tue, Jan 20, 2026 at 10:25:27PM +0000, Suren Baghdasaryan wrote: > > On Fri, Jan 16, 2026 at 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()). Of course, when a slab was frozen, this doesn't apply and __slab_free() explicitly handles that case. -- Cheers, Harry / Hyeonggon