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Wed, 27 Aug 2025 08:26:35 +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 mNbSLDvBrmhNfgAAD6G6ig (envelope-from ); Wed, 27 Aug 2025 08:26:35 +0000 From: Vlastimil Babka Date: Wed, 27 Aug 2025 10:26:42 +0200 Subject: [PATCH v6 10/10] 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: <20250827-slub-percpu-caches-v6-10-f0f775a3f73f@suse.cz> References: <20250827-slub-percpu-caches-v6-0-f0f775a3f73f@suse.cz> In-Reply-To: <20250827-slub-percpu-caches-v6-0-f0f775a3f73f@suse.cz> To: Suren Baghdasaryan , "Liam R. Howlett" , Christoph Lameter , David Rientjes Cc: Roman Gushchin , Harry Yoo , Uladzislau Rezki , linux-mm@kvack.org, linux-kernel@vger.kernel.org, rcu@vger.kernel.org, maple-tree@lists.infradead.org, vbabka@suse.cz X-Mailer: b4 0.14.2 X-Stat-Signature: 73nsdt4k4rnwyh6fiq76g8e8xuyiot9o X-Rspam-User: X-Rspamd-Queue-Id: 75F77A0007 X-Rspamd-Server: rspam05 X-HE-Tag: 1756283234-957962 X-HE-Meta: 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 visZtSb2 B9CqUD55fZfNkc/oOu3cMV8uKLer2wMJLZ3WhNqua2K+nMv718+Pcj+auD+9IOwGmmehTPCoRpRobAHk++AWqEZqVXQrr/ypJtNjvRvC9+u9AdTp4ioD3rOHyZgdJHHFHEqL6V1NlHkmvS8SX4PVmhUnmflSiToPp/ZxKXP7srzHHouMQm3pfJoA4OH0H63fbwPjcWqMhG2umOgK6KuGe2HJuog9zc3Pe9l1k5f1R+Q/93RFNCfYyFi5ja+SgHFGrUJPIoF0oJ9tBeel91sO4zlJoVrHjQufWZD5Pg89y3dRKEdBwAEhjM6Go0rY33+S3s1SN 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