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a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=RD47p0oAkeU5bO7t-o6f:22 a=VwQbUJbxAAAA:8 a=errNbg_PrlJTq5nbWgkA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: NZfk_ch4Whm9WFXQOKuceHUlm2nNOjFf X-Proofpoint-ORIG-GUID: NZfk_ch4Whm9WFXQOKuceHUlm2nNOjFf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA2MDA0NSBTYWx0ZWRfX3jtYoB+74QfX SCmRMkphqX4eGYe5e06c3snLZunL3kPg5vNaH2ZVlFg1xS4y4rAyU9SGL8Lqxbyh+qTSe5zK+Ml lKCiV4VNS8H1L6JWgaKfZcPddprDA7i/RmD7pNiWpuwGybORa49ocqY3ak/0HWN+sLLOSSIGmWi Z0vohC/Ql7vtnG1TiavgCp5mn/sznaxmVbLy8i4P8ruE43hODLTkecM+zQNhRwsipIcAtbBcsrv VQ47Z7y7y2CPF74KyraqDkzk4iO0JOfA4Ov0sJGrjIXRtKoTghNP9bGaFxJm5pj+z0DSoUMyUMq MffclN2FTAxFNpzzye1tmKr7M5L/uam7thLs9kq4v8NV2kPeSTTMcd9uFwCdWkDKqcdCnhynG16 /VwdgD35Rq5ZRYWvKHcsg8B1x8Ug7CYJYptno0AgoCkowweUyXfKWLmg/6mD1/2FDybdhvDK0ei LHuOFlrXY+sIyzcRagQ== 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