From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EBC874A092A; Wed, 2 Sep 2026 13:27:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788355677; cv=none; b=pN6nmY4TQRh5lTD2pE8VRNaG7OZIIxjGKCL39e7YMJYQ/c2wbUCyfwTX+blgYWVtTdUo+e67do14a9391J95vws4IikRRPdHoIiXN43tect90PXRqd0i0rDRBa11fOb7eQxUenu9sSyo2/U91qrx/Z4OqwkDlnpx9krQTiLYQqQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788355677; c=relaxed/simple; bh=IJL8sHLJzETBX5EUCq0+XoQYAigxpIcbmnUp4kDolk0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ow5kMCdGWFtVwaQ4QlRyiYoRKrjcAkoLW4slNK6/UtfOps3umQObKCZ/Q4DOxFQaI94w2eSF+mn9cfXG9MNcbBnF0wh7RoxOR6UodAVU02N37hLQAJYlJ57u4htcVrBLNrEy/c78J1bUJPVSUcjuHd63khkmNvAhzcVRTj4j6ec= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k+7PMWtr; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="k+7PMWtr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED25D1F00A3F; Wed, 2 Sep 2026 13:27:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788355672; bh=rmjpEvPISZ+t3PGfRKTnDAOa6lOnl7cuFJjli1+tyLs=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=k+7PMWtrOSFTyQ9F5g7M7pAPrvsEadjDIxkAlifrK3tS7HWsm2efcg1GN0UE8dXi/ J8nmGfqbi4ZBMR/I5JaAo/uWxbElKXGEmWPWvW2MDhPgO8jexUfhVlFda5mKtUwWhs btH5gqf8Z+qJ3mDS225R6aLd0Cs5RugRuIiASI+AdyQR3ySMWW42UQe1M48jeAzS/o fB6q2i/ah5Rfh9e6YzYh7jtevdOucodmF+3AKJ6Vc20FQWpSWmPwQyvYQ3PlpcrWTw 1iJD6F9WyYK1tvLap+od60/zIkt7WXHWYjJX1XJLoi4Ne9f6YvDoO0SsQ8tz6DQXtc CCydLNfXcKkLA== From: Andreas Hindborg Date: Wed, 02 Sep 2026 15:26:06 +0200 Subject: [PATCH v5 10/12] xarray, radix-tree: enable sheaf support for kmem_cache Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260902-xarray-entry-send-v5-10-d18adae40708@kernel.org> References: <20260902-xarray-entry-send-v5-0-d18adae40708@kernel.org> In-Reply-To: <20260902-xarray-entry-send-v5-0-d18adae40708@kernel.org> To: Tamir Duberstein , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Matthew Wilcox , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Harry Yoo , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin Cc: Andreas Hindborg , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1261; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=IJL8sHLJzETBX5EUCq0+XoQYAigxpIcbmnUp4kDolk0=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqmCQiFeVnhwTDdQFJRjCYOO1PxQcejmTfYtGJX zaKc7loM6SJAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCapgkIgAKCRD6UCkIqsW9 0AS4D/4mR4N32k1U3pAh2rJfK5jfyROypSsF3fJL4XksWWspR996nY603YS/pWVLIEy1IvXUWiG zqBNIfTISK+5Gx4Zb1jq+4DqRo0sq1xW2/UYQyFZYdUXfAZ5LZQTcZa9CTnZmDTqKXZLb6nZ0MI cXa5QRrjyQluHCkg5ZWkVZ52B5rdcJZdknWPvvFNd73JOGc7bUNfxHvUC1W8x2nx86MTv0rePvL bbMOofBww0Ps/BY5MW+snKMunRkCvVyn3nr3+yYzLBkC9mCj76NoXooxUafImT2SMhTS+j/KkV8 gr5BizGqw4DTv9N/O8hzxe0raN/NkIdnAmUtXONK/DmjRBDL1dkl1xlHeFix6R6MWJjFcSK9SdC i6AV4GeoM7//WiIye3g5JDS22RbYfF3go+/RiKCgEgSTLZA6NkI6b/159rmlcPGZMmk6VEzcADO KmeclUmPOi6HKrWMP+NOymfrt04o0ji7XvH1qJ4ma3lITbaBkU8m7EafGDO0omxGmFCCr5eIzzi RrkCMszJ71vAm8fOhGeCYJnKFMtnWkjJJNyLwj/qmTOC6ZD5lDmcTd9b4yNcVuUjQLRMSJUZ6P3 QsXVwKBoA8ADBipBkSodYaBfCwnJRH9UGwYkK0x4jHKlUIYl6ScJzFxNrSttLGjX4q9XzoCB1jH m32JydtEphMt1uA== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 The rust null block driver plans to rely on preloading xarray nodes from the radix_tree_node_cachep kmem_cache. Cc: "Matthew Wilcox (Oracle)" Assisted-by: LLM Signed-off-by: Andreas Hindborg --- lib/radix-tree.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 976b9bd02a1b5..1cf0012b15ade 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -1598,10 +1598,16 @@ void __init radix_tree_init(void) BUILD_BUG_ON(RADIX_TREE_MAX_TAGS + __GFP_BITS_SHIFT > 32); BUILD_BUG_ON(ROOT_IS_IDR & ~GFP_ZONEMASK); BUILD_BUG_ON(XA_CHUNK_SIZE > 255); - radix_tree_node_cachep = kmem_cache_create("radix_tree_node", - sizeof(struct radix_tree_node), 0, - SLAB_PANIC | SLAB_RECLAIM_ACCOUNT, - radix_tree_node_ctor); + + struct kmem_cache_args args = { + .ctor = radix_tree_node_ctor, + .sheaf_capacity = 64, + }; + + radix_tree_node_cachep = kmem_cache_create( + "radix_tree_node", sizeof(struct radix_tree_node), &args, + SLAB_PANIC | SLAB_RECLAIM_ACCOUNT); + ret = cpuhp_setup_state_nocalls(CPUHP_RADIX_DEAD, "lib/radix:dead", NULL, radix_tree_cpu_dead); WARN_ON(ret < 0); -- 2.51.2