Just make sure the maple_node_cache has a percpu array of size 32. Will break with CONFIG_SLAB. --- lib/maple_tree.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index bb24d84a4922..d9e7088fd9a7 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -6213,9 +6213,16 @@ bool mas_nomem(struct ma_state *mas, gfp_t gfp) void __init maple_tree_init(void) { + int ret; + maple_node_cache = kmem_cache_create("maple_node", sizeof(struct maple_node), sizeof(struct maple_node), - SLAB_PANIC, NULL); + SLAB_PANIC | SLAB_NO_MERGE, NULL); + + ret = kmem_cache_setup_percpu_array(maple_node_cache, 32); + + if (ret) + pr_warn("error %d creating percpu_array for maple_node_cache\n", ret); } /** -- 2.43.0