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 0sGec1Eh 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Feb 26, 2026 at 07:02:11PM +0100, Vlastimil Babka (SUSE) wrote: > On 2/25/26 10:31, Ming Lei wrote: > > Hi Vlastimil, > > > > On Wed, Feb 25, 2026 at 09:45:03AM +0100, Vlastimil Babka (SUSE) wrote: > >> On 2/24/26 21:27, Vlastimil Babka wrote: > >> > > >> > It made sense to me not to refill sheaves when we can't reclaim, but I > >> > didn't anticipate this interaction with mempools. We could change them > >> > but there might be others using a similar pattern. Maybe it would be for > >> > the best to just drop that heuristic from __pcs_replace_empty_main() > >> > (but carefully as some deadlock avoidance depends on it, we might need > >> > to e.g. replace it with gfpflags_allow_spinning()). I'll send a patch > >> > tomorrow to test this theory, unless someone beats me to it (feel free to). > >> Could you try this then, please? Thanks! > > > > Thanks for working on this issue! > > > > Unfortunately the patch doesn't make a difference on IOPS in the perf test, > > follows the collected perf profile on linus tree(basically 7.0-rc1 with your patch): > > what about this patch in addition to the previous one? Thanks. > > ----8<---- > From d3e8118c078996d1372a9f89285179d93971fdb2 Mon Sep 17 00:00:00 2001 > From: "Vlastimil Babka (SUSE)" > Date: Thu, 26 Feb 2026 18:59:56 +0100 > Subject: [PATCH] mm/slab: put barn on every online node > > Including memoryless nodes. > > Signed-off-by: Vlastimil Babka (SUSE) > --- Just taking a quick grasp... > @@ -6121,7 +6122,8 @@ void slab_free(struct kmem_cache *s, struct slab *slab, void *object, > if (unlikely(!slab_free_hook(s, object, slab_want_init_on_free(s), false))) > return; > > - if (likely(!IS_ENABLED(CONFIG_NUMA) || slab_nid(slab) == numa_mem_id()) > + if (likely(!IS_ENABLED(CONFIG_NUMA) || (slab_nid(slab) == numa_mem_id()) > + || !node_isset(slab_nid(slab), slab_nodes)) I think you intended !node_isset(numa_mem_id(), slab_nodes)? "Skip freeing to pcs if it's remote free, but memoryless nodes is an exception". > && likely(!slab_test_pfmemalloc(slab))) { > if (likely(free_to_pcs(s, object, true))) > return; -- Cheers, Harry / Hyeonggon