Memory hotplug now keeps N_NORMAL_MEMORY up to date correctly, so make can_free_to_pcs() use it. As a result, when freeing objects on memoryless nodes, or on nodes that have memory but only in ZONE_MOVABLE, the objects can be freed to the sheaf instead of going through the slow path. Signed-off-by: Hao Li --- Hi Vlastimil, this patch depends on a prerequisite patch[1] from a few days ago. I'm not sure how this should be handled. I wonder if Andrew might put them in the same tree. [1] https://lore.kernel.org/linux-mm/20260330035941.518186-1-hao.li@linux.dev/ --- mm/slub.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index fb2c5c57bc4e..4927407c9699 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -6022,14 +6022,15 @@ static __always_inline bool can_free_to_pcs(struct slab *slab) goto check_pfmemalloc; /* - * Freed object isn't from this cpu's node, but that node is memoryless. + * Freed object isn't from this cpu's node, but that node is memoryless + * or only has ZONE_MOVABLE memory, which slab cannot allocate from. * Proceed as it's better to cache remote objects than falling back to * the slowpath for everything. The allocation side can never obtain * a local object anyway, if none exist. We don't have numa_mem_id() to * point to the closest node as we would on a proper memoryless node * setup. */ - if (unlikely(!node_state(numa_node, N_MEMORY))) + if (unlikely(!node_state(numa_node, N_NORMAL_MEMORY))) goto check_pfmemalloc; #endif -- 2.50.1