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 1DF793CC7D3; Thu, 4 Jun 2026 19:59:48 +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=1780603192; cv=none; b=aOKGAOJLO9oKBBjhNmwETeAR7QY4H1x6VVS3YjJtRvLivcjzTAA+8a8zKoNLvO8DrRlhk3urv+dUIacoEsRNHU3KvBHVKnMWzVNupktDzjGeRdIkQOaU6yvIAz33QzCZ+pe4pnuPdT65hJxrh3kOCUksQBqjvhky6YE9+8I96p0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780603192; c=relaxed/simple; bh=BhCLKxRMqF4V+mE7gy9xjhXHgxHe6HNf41/h4Z3bGDc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=NqJAqHmEqBGzrW3JQ7+XRn8Z3XDDdC2UD3wUr1UH/gYFfO1It/AvyPuz8MWfnS8WgjQIS2ugOgEdvG07XeO0ByFdt1XalV+CcwBfEJhtHVtBw+59SMDhp8lLDCUuvFDQnGYER1YKw9EpS9N8YNDVf+xbp/SICbEo8rAdaItKovk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JPB7jQM4; 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="JPB7jQM4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BB3E91F00893; Thu, 4 Jun 2026 19:59:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780603188; bh=SmiYFIKuE1zvPsAEwECS8Z/13j8fqEOETWiRIjYfqnM=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=JPB7jQM4qJtWMPT2RpIm3aDZ+OqvI++pmnDzF8FMZBTb31pYMzeuqqRAwPEt2U/M8 oJKnydYcgbMlOhGRVfZEoV0I58oPOh+XPf6uMTBjDM9Eep/0dTqrdtnj68lmGASZox PBX5XLmf0gL1N51R9I3dAOan6GiEkpZ++4QT/rp6O1XJsmBIswbVhxlZIoWaRneVA4 /VQkNhLFs1jQhfm8QOigz8afOxpQ3XRLy5aaXRNNqiIuKX9UKc1/ytGC3dlFArNUql LdwpoFUyRNrClq/wrHMIXnf1s7kSW43K7mdm0+mdt1SdV+xeMClipC88ye1INxd9de IvKZV6qi03OKA== From: Andreas Hindborg Date: Thu, 04 Jun 2026 21:58:16 +0200 Subject: [PATCH v4 10/11] xarray, radix-tree: enable sheaf support for kmem_cache Precedence: bulk X-Mailing-List: rust-for-linux@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: <20260604-xarray-entry-send-v4-10-965f6028790e@kernel.org> References: <20260604-xarray-entry-send-v4-0-965f6028790e@kernel.org> In-Reply-To: <20260604-xarray-entry-send-v4-0-965f6028790e@kernel.org> To: Miguel Ojeda , Alex Gaynor , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Alice Ryhl , Trevor Gross , Danilo Krummrich , Andrew Morton , Christoph Lameter , David Rientjes , Roman Gushchin , Tamir Duberstein , Boqun Feng , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Harry Yoo , Hao Li , Tamir Duberstein , Boqun Feng , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Harry Yoo Cc: Daniel Gomez , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andreas Hindborg , "Matthew Wilcox (Oracle)" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1241; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=BhCLKxRMqF4V+mE7gy9xjhXHgxHe6HNf41/h4Z3bGDc=; b=kA0DAAoB+lApCKrFvdAByyZiAGoh2PKiOBQrTuWb4+c//hzTix9gM8yNN9SYEMxv0B6vxjLml 4kCMwQAAQoAHRYhBFeK2cjZZnYmKsBqhvpQKQiqxb3QBQJqIdjyAAoJEPpQKQiqxb3Qbq0P/jVv ytNdtugJpYOvBMGd1/YyL95/92eWNJhenjaWD1s1c0k4gvnjG7MsQU66xf/lWXcu++IXGQOkSqx NU+8laAbYXgJ9wN62QfkdW8g08qC/0aduBghYfnV6wkNkH2TAeb+plHFV3GehmBmt5ah3diPeSd q8/UWaLDuC6dFp/gK0VpFU4Jx5nq/I18kDluysSCN2SVcm0YYMEee4taiZaClYxtYt9nmS/9fjz pm0KexPuArJ4IHr0LUsEX7m5k+JCUG9v5jFyWHbg97msdx4K9q7/8l/06Ru1TrMFJB31+FGgYFX PiQny9SX83eY87vZ2QFPBZoflNlDll8SIEVX0fD3AKwXL8IkIK7GeyvG2pGgs2Tb37siozoMGJs BL1TLFNii7SWJoNjTxQcrVb+hIi1ri4hAibMvDE3DCV05yVhiEGX2sQIQnFPEEAoUlH6K2ueN6b idJJycJ6yaueCdo5sT7p0hyuIk5m2MJprCBbkbviOogzBeBdhlc3FyovogAtHhd1eS4XMtEsg6+ NdE5CmDY8wrOrdGdIheNX9d88Utv3GLICqXBLW5kKukdbGuLnXFDjds6oeWEJnBsPr2BfZ+Pj2c 7f/YdnKxZaIpg5SIR+wVwdSoXlrLhifSSTWTd/QAehI+Ash+Nc0acpg3gWI/knsDdI/46xM0rPI 0qePx 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)" 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 976b9bd02a1b..1cf0012b15ad 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