From: Liam R. Howlett Date: Mon, 24 Jul 2023 18:31:50 +0000 (-0400) Subject: maple_tree: adjust node allocation on mas_rebalance() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c108df767fb786586274b2435473885151d6f360;p=linux.git maple_tree: adjust node allocation on mas_rebalance() mas_rebalance() is called to rebalance an insufficient node into a single node or two sufficient nodes. The preallocation estimate is always too many in this case as the height of the tree will never grow and there is no possibility to have a three way split in this case, so revise the node allocation count. Link: https://lkml.kernel.org/r/20230724183157.3939892-9-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Cc: Peng Zhang Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 0d7e30c7d9993..494f884ef17fc 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -3136,7 +3136,7 @@ static inline int mas_rebalance(struct ma_state *mas, * tries to combine the data in the same way. If one node contains the * entire range of the tree, then that node is used as a new root node. */ - mas_node_count(mas, 1 + empty_count * 3); + mas_node_count(mas, empty_count * 2 - 1); if (mas_is_err(mas)) return 0;