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slub: use N_NORMAL_MEMORY in can_free_to_pcs to handle remote frees

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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 <hao.li@linux.dev>
Acked-by: Harry Yoo (Oracle) <harry@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Link: https://patch.msgid.link/20260403073958.8722-1-hao.li@linux.dev
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
This commit is contained in:
Hao Li
2026-04-03 15:37:36 +08:00
committed by Vlastimil Babka (SUSE)
parent e65d430111
commit 7f9bb84fdb
1 changed files with 3 additions and 2 deletions
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5
mm/slub.c
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@@ -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