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Mon, 1 Sep 2025 11:08:53 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id uMHJEcV+tWjtDgAAD6G6ig (envelope-from ); Mon, 01 Sep 2025 11:08:53 +0000 From: Vlastimil Babka Date: Mon, 01 Sep 2025 13:08:53 +0200 Subject: [PATCH 03/12] maple_tree: use percpu sheaves for maple_node_cache MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250901-maple-sheaves-v1-3-d6a1166b53f2@suse.cz> References: <20250901-maple-sheaves-v1-0-d6a1166b53f2@suse.cz> In-Reply-To: <20250901-maple-sheaves-v1-0-d6a1166b53f2@suse.cz> To: "Liam R. Howlett" , Matthew Wilcox , Lorenzo Stoakes , Jann Horn , Pedro Falcato , Suren Baghdasaryan Cc: Harry Yoo , Andrew Morton , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Vlastimil Babka X-Mailer: b4 0.14.2 X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 3FA98A000D X-Stat-Signature: p1wssfs3xiriuutyohge9k74n64qe784 X-HE-Tag: 1756724940-889353 X-HE-Meta: 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 9oPngOkC 3ZxiLRpZz3NFG13Y++g8NnjF4ktKcIhY4SE2J4+FvzE8wV9r9CrcZvkzqdXI0Wmav9Q1DI38cjLEMXOYKyLLBPHz/XTQ+cQJNqn7KFvmL6MbA1sQ1Som0uFxti2XYX7oG0tDMU0Dw5nXf2pGlbpJnVSrcVmoBU7/qoe9nwaWFq8b8+U0LcANiNvQ+/eMvhzYkrFEsASZGKclPuq0MJaP48VhcDYdOkvtLVpIXKnAl9P8ndjnChaxnwiT8FI6+giAHcDBjj/5CfLcB112ie/lZUIe5abEuzPRKec/SfMCCFjApRZCAp0x94HiYYU5KLBRU1MQz 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: List-Subscribe: List-Unsubscribe: Setup the maple_node_cache with percpu sheaves of size 32 to hopefully improve its performance. Note this will not immediately take advantage of sheaf batching of kfree_rcu() operations due to the maple tree using call_rcu with custom callbacks. The followup changes to maple tree will change that and also make use of the prefilled sheaves functionality. Signed-off-by: Vlastimil Babka Reviewed-by: Suren Baghdasaryan --- lib/maple_tree.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index b4ee2d29d7a962ca374467d0533185f2db3d35ff..a0db6bdc63793b8bbd544e246391d99e880dede3 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -6302,9 +6302,14 @@ bool mas_nomem(struct ma_state *mas, gfp_t gfp) void __init maple_tree_init(void) { + struct kmem_cache_args args = { + .align = sizeof(struct maple_node), + .sheaf_capacity = 32, + }; + maple_node_cache = kmem_cache_create("maple_node", - sizeof(struct maple_node), sizeof(struct maple_node), - SLAB_PANIC, NULL); + sizeof(struct maple_node), &args, + SLAB_PANIC); } /** -- 2.51.0