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Thu, 15 Jun 2023 06:10:29 -0700 (PDT) Received: from localhost.localdomain ([139.177.225.249]) by smtp.gmail.com with ESMTPSA id x1-20020a170902b40100b001a804b16e38sm14036019plr.150.2023.06.15.06.10.24 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 15 Jun 2023 06:10:28 -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: [PATCH 1/8] maple_tree: set the node limit when creating a new root node Date: Thu, 15 Jun 2023 21:08:52 +0800 Message-Id: <20230615130859.21858-2-zhangpeng.00@bytedance.com> X-Mailer: git-send-email 2.37.0 (Apple Git-136) In-Reply-To: <20230615130859.21858-1-zhangpeng.00@bytedance.com> References: <20230615130859.21858-1-zhangpeng.00@bytedance.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: EAF0C1A001A X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: exet3xwya9shsofr43uf8yy715f797m3 X-HE-Tag: 1686834630-913397 X-HE-Meta: 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 3IsqQ2o1 bOIqXMaGu9FzstvJnb0vx+3XdFEhvFDehfy+60eSF3frx7WrtV0o5y5wJBxG7yfvrDuCQliErBOaSPkxvoSHv98vFq3IWXWLwx0Ro0bxhbvrX8up1vZ65SWnnwtkF0BigFy5cVdQqEBr9zceneWTwk9LmanqJP+ZdwHTnKSUoONllSTR21qOkQoIL/4AHmaFY5FI8riQUshXgfYBPyQfRoRpvJWAgA04QZSQ/VHBUE5AAKEeAdphVrcSbLVks8b8xcTts0WdmAd52Q6uhtJShNxiW8cIQI5ysfEOfG0htmVherclLOv/UOEsi35F0usEIeSm9yyYbnwJE7DZwtDecryWCKCS+9Vo84MAGuhgv32PSZX0y0ABWuXzFnihxVBOb52DhcmMz0+2qDoB0qJm3wrG1kw/fpZQAybTSlu0fQpoXI0szX/v58peqghe/vxE+y9dzl6X8E1oTi1c= 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 --- 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 279b871f21a6..23202edb9f1e 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);