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Fri, 07 Jul 2023 03:11:14 -0700 (PDT) Received: from GL4FX4PXWL.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id x11-20020a056a00270b00b0068288aaf23esm2602549pfv.100.2023.07.07.03.11.12 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 07 Jul 2023 03:11:14 -0700 (PDT) From: Peng Zhang To: Liam.Howlett@oracle.com Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, maple-tree@lists.infradead.org, Peng Zhang Subject: [RESEND PATCH 1/8] maple_tree: set the node limit when creating a new root node Date: Fri, 7 Jul 2023 18:10:50 +0800 Message-Id: <20230707101057.29326-2-zhangpeng.00@bytedance.com> X-Mailer: git-send-email 2.37.0 (Apple Git-136) In-Reply-To: <20230707101057.29326-1-zhangpeng.00@bytedance.com> References: <20230707101057.29326-1-zhangpeng.00@bytedance.com> MIME-Version: 1.0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 1613A120016 X-Stat-Signature: wicrcunopdcffohwxa4oyo711zh9dyei X-Rspam-User: X-HE-Tag: 1688724675-678958 X-HE-Meta: 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 fv4Oa41T 3aGo2e3d4Nk3wRLAy5Fb7aRZKj77UcV24nUAPPnONkuyR1xmsyjxqY9bieiC/N4Lv0Kg8fSSemWm+4NgarGPIx7v+NJeA5/4Aq6gh+yYalIwp9dvIIUJ9eocIdssNLkd/x5eZS7HlPsDMZ2zqBNXnhKVmA0Zq9mHH9A+GYPJWZ6ceEx1xVBcP1PWm0B/UAJ8Au08r/3K57NxDgmHtMK9lOfo7pN5FpCvn0maBGVC5nN2eA3iP/xICViH7fD9MAn9zo5gwbzFlDi+xioMaLNV2Z7udPNMCUq0KSD1BfrUtXTbzDSUAk/Y460v6Z3fdrbJhw0xpVIsk2k2/m3HYYeSdlYimRnDYU9AwLKWhqLXTOOzxQPLBsEAujclFa+c6t2ENwl+DTosiKMfmTSB3aFJzebUUOQIh6QO5e3FddqlYADmsktgjPZDKawJv0E8uyB8KPkXfI5KIeV9SAJkOY9eAVkbuoA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Set the node limit of the root node so that the last pivot of all nodes is the node limit (if the node is not full). Signed-off-by: Peng Zhang Reviewed-by: Liam R. Howlett --- lib/maple_tree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index d3072858c280..f55e59bd9122 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -3692,7 +3692,8 @@ static inline int mas_root_expand(struct ma_state *mas, void *entry) mas->offset = slot; pivots[slot] = mas->last; if (mas->last != ULONG_MAX) - slot++; + pivots[++slot] = ULONG_MAX; + mas->depth = 1; mas_set_height(mas); ma_set_meta(node, maple_leaf_64, 0, slot);