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tools/testing/radix-tree: test maple tree chaining mas_preallocate() calls 

Testing calling multiple mas_preallocate() calls in a row after adjusting
the maple state.  Ensures new calls to mas_preallocate() will change the
number of allocated nodes.

Link: https://lkml.kernel.org/r/20250616184521.3382795-4-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Hailong Liu <hailong.liu@oppo.com>
Cc: "Liam R. Howlett" <howlett@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2025-06-16 14:45:21 -04:00 committed by Andrew Morton
parent f687fd5af8
commit ec3681e873
1 changed files with 12 additions and 0 deletions
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12
tools/testing/radix-tree/maple.c
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@ -35669,6 +35669,18 @@ static noinline void __init check_prealloc(struct maple_tree *mt)
allocated = mas_allocated(&mas);
height = mas_mt_height(&mas);
MT_BUG_ON(mt, allocated != 0);
/* Chaining multiple preallocations */
mt_set_in_rcu(mt);
mas_set_range(&mas, 800, 805); /* Slot store, should be 0 allocations */
MT_BUG_ON(mt, mas_preallocate(&mas, ptr, GFP_KERNEL) != 0);
allocated = mas_allocated(&mas);
MT_BUG_ON(mt, allocated != 0);
mas.last = 809; /* Node store */
MT_BUG_ON(mt, mas_preallocate(&mas, ptr, GFP_KERNEL) != 0);
allocated = mas_allocated(&mas);
MT_BUG_ON(mt, allocated != 1);
mas_store_prealloc(&mas, ptr);
}
/* End of preallocation testing */