On 9/1/25 7:08 AM, Vlastimil Babka wrote:
Setup the maple_node_cache with percpu sheaves of size 32 to hopefully
improve its performance. Note this will not immediately take advantage
of sheaf batching of kfree_rcu() operations due to the maple tree using
call_rcu with custom callbacks. The followup changes to maple tree will
change that and also make use of the prefilled sheaves functionality.
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
Reviewed-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
---
lib/maple_tree.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index b4ee2d29d7a962ca374467d0533185f2db3d35ff..a0db6bdc63793b8bbd544e246391d99e880dede3 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -6302,9 +6302,14 @@ bool mas_nomem(struct ma_state *mas, gfp_t gfp)
void __init maple_tree_init(void)
{
+ struct kmem_cache_args args = {
+ .align = sizeof(struct maple_node),
+ .sheaf_capacity = 32,
+ };
+
maple_node_cache = kmem_cache_create("maple_node",
- sizeof(struct maple_node), sizeof(struct maple_node),
- SLAB_PANIC, NULL);
+ sizeof(struct maple_node), &args,
+ SLAB_PANIC);
}
/**
