From: Vlastimil Babka <vbabka@suse.cz>
Date: Mon, 7 Aug 2023 18:52:02 +0000 (+0200)
Subject: maple_tree: use slub percpu array
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8f15e40cae9f8f414d4d6fb18afb8731b0dc134d;p=users%2Fjedix%2Flinux-maple.git

maple_tree: use slub percpu array

Just make sure the maple_node_cache has a percpu array of size 32.

Will break with CONFIG_SLAB.
---

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 89f8d2160277..1fbfd4a7f01d 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -6233,9 +6233,16 @@ 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);
 }
 
 /**