From nobody Wed Apr 8 14:05:23 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6D3DC32773 for ; Fri, 19 Aug 2022 20:49:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351942AbiHSUt4 (ORCPT ); Fri, 19 Aug 2022 16:49:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351625AbiHSUtS (ORCPT ); Fri, 19 Aug 2022 16:49:18 -0400 Received: from mail-qv1-xf29.google.com (mail-qv1-xf29.google.com [IPv6:2607:f8b0:4864:20::f29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E8AFBE4CA for ; Fri, 19 Aug 2022 13:49:13 -0700 (PDT) Received: by mail-qv1-xf29.google.com with SMTP id y4so4203200qvp.3 for ; Fri, 19 Aug 2022 13:49:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=E7Xq/XCIcO6OqJQYLMUxDOI6zGFTDKoXgxMJiXC3P5I=; b=PnhSY8rM7rduW9739YQGmVnMq/JGCCmIPkz6MaFXLYg5jNAb1UrdPTDggg3S+dNGgJ 2Y7P7W5dgjp2YYRCd8rcBCIO8TU/aSkgyDY1qZlMu1yk3Y+QY+oYAUm9E8JWOIN6jBd7 9cLfbbI/yGRKAc3Y15XmddVSxaTj8LHTLbh0Q= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=E7Xq/XCIcO6OqJQYLMUxDOI6zGFTDKoXgxMJiXC3P5I=; b=rdalrlzheEVF66ukQfTC8a0gO4KbIzIdpDwwif00XW6c2ESZCPYhoE38WWqchwkZHk hOSXdSrEZY2k43Z9uLV2KuxsmuG1c2bGY3Yp0JMwdxaw+EFoGHoID1GNNGXr0nKk8W2P j414UtpiVuGiqF1TFDnirMl0t4Jf6GB8Me2dVos43RbJ1L+cHGrbB46rPVOsil7cWS7z 9CetYGw7xNfywod57VM8XwkwuyOaiXUJ61aUZpHyz1NfDqv+Yh4DAzT9G3Rv8RrSfqQr 7UHGkt1pQr+E9KkWPEpF3vuehnno6F197vfsP2Dswo0A7JR483pcb6D7DOL1eTf7e4Bs 5hfg== X-Gm-Message-State: ACgBeo2Ha2D6G7BQ0cI+UO6gcGxdmOn05FOSLWCrhbP6HqCR+U0Xrjy6 tYGvMdjyuNHf3mXfea9hh1Sb5l8Zw3W+CQ== X-Google-Smtp-Source: AA6agR5kzA0uvHG4tfTkS5Y71k+SYHXpzSvkUg40aguVGCWBXSgV6NPjLlhGB6DaqBmALd9Ti9wdHg== X-Received: by 2002:a05:6214:2aa2:b0:477:47ad:c2bf with SMTP id js2-20020a0562142aa200b0047747adc2bfmr8105366qvb.125.1660942152066; Fri, 19 Aug 2022 13:49:12 -0700 (PDT) Received: from joelboxx.c.googlers.com.com (228.221.150.34.bc.googleusercontent.com. [34.150.221.228]) by smtp.gmail.com with ESMTPSA id x8-20020a05620a258800b006b9a89d408csm4377123qko.100.2022.08.19.13.49.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Aug 2022 13:49:11 -0700 (PDT) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" , paulmck@kernel.org, Rushikesh S Kadam , "Uladzislau Rezki (Sony)" , Neeraj upadhyay , Frederic Weisbecker , Steven Rostedt , rcu , vineeth@bitbyteword.org Subject: [PATCH v4 11/14] lib: Move call_rcu() to call_rcu_lazy() Date: Fri, 19 Aug 2022 20:48:54 +0000 Message-Id: <20220819204857.3066329-12-joel@joelfernandes.org> X-Mailer: git-send-email 2.37.2.609.g9ff673ca1a-goog In-Reply-To: <20220819204857.3066329-1-joel@joelfernandes.org> References: <20220819204857.3066329-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Move radix-tree and xarray to call_rcu_lazy(). This is required to prevent callbacks triggering RCU machinery too quickly and too often, which adds more power to the system. Signed-off-by: Joel Fernandes (Google) --- lib/radix-tree.c | 2 +- lib/xarray.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/radix-tree.c b/lib/radix-tree.c index b3afafe46fff..1526dc9e1d93 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -305,7 +305,7 @@ void radix_tree_node_rcu_free(struct rcu_head *head) static inline void radix_tree_node_free(struct radix_tree_node *node) { - call_rcu(&node->rcu_head, radix_tree_node_rcu_free); + call_rcu_lazy(&node->rcu_head, radix_tree_node_rcu_free); } =20 /* diff --git a/lib/xarray.c b/lib/xarray.c index ea9ce1f0b386..230abc8045fe 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -257,7 +257,7 @@ static void xa_node_free(struct xa_node *node) { XA_NODE_BUG_ON(node, !list_empty(&node->private_list)); node->array =3D XA_RCU_FREE; - call_rcu(&node->rcu_head, radix_tree_node_rcu_free); + call_rcu_lazy(&node->rcu_head, radix_tree_node_rcu_free); } =20 /* --=20 2.37.2.609.g9ff673ca1a-goog