The patch titled
Subject: maple_tree: add a test case to check maple_alloc
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-add-a-test-case-to-check-maple_alloc.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-add-a-test-case-to-check-maple_alloc.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
Subject: maple_tree: add a test case to check maple_alloc
Date: Tue, 11 Apr 2023 12:10:05 +0800
Add a test case to check whether the number of maple_alloc structures is
actually equal to mas->alloc->total.
Link: https://lkml.kernel.org/r/20230411041005.26205-2-zhangpeng.00@xxxxxxxxxxxxx
Signed-off-by: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/radix-tree/maple.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
--- a/tools/testing/radix-tree/maple.c~maple_tree-add-a-test-case-to-check-maple_alloc
+++ a/tools/testing/radix-tree/maple.c
@@ -55,6 +55,28 @@ struct rcu_reader_struct {
struct rcu_test_struct2 *test;
};
+static int get_alloc_node_count(struct ma_state *mas)
+{
+ int count = 1;
+ struct maple_alloc *node = mas->alloc;
+
+ if (!node || ((unsigned long)node & 0x1))
+ return 0;
+ while (node->node_count) {
+ count += node->node_count;
+ node = node->slot[0];
+ }
+ return count;
+}
+
+static void check_mas_alloc_node_count(struct ma_state *mas)
+{
+ mas_node_count_gfp(mas, MAPLE_ALLOC_SLOTS + 1, GFP_KERNEL);
+ mas_node_count_gfp(mas, MAPLE_ALLOC_SLOTS + 3, GFP_KERNEL);
+ MT_BUG_ON(mas->tree, get_alloc_node_count(mas) != mas->alloc->total);
+ mas_destroy(mas);
+}
+
/*
* check_new_node() - Check the creation of new nodes and error path
* verification.
@@ -69,6 +91,8 @@ static noinline void check_new_node(stru
MA_STATE(mas, mt, 0, 0);
+ check_mas_alloc_node_count(&mas);
+
/* Try allocating 3 nodes */
mtree_lock(mt);
mt_set_non_kernel(0);
_
Patches currently in -mm which might be from zhangpeng.00@xxxxxxxxxxxxx are
maple_tree-fix-a-potential-memory-leak-oob-access-or-other-unpredictable-bug.patch
mm-kfence-improve-the-performance-of-__kfence_alloc-and-__kfence_free.patch
maple_tree-simplify-mas_wr_node_walk.patch
maple_tree-use-correct-variable-type-in-sizeof.patch
maple_tree-add-a-test-case-to-check-maple_alloc.patch
