From patchwork Sat Mar 25 18:55:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yury Norov X-Patchwork-Id: 13187878 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 1B21CC6FD20 for ; Sat, 25 Mar 2023 18:56:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231961AbjCYS4M (ORCPT ); Sat, 25 Mar 2023 14:56:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231845AbjCYSz6 (ORCPT ); Sat, 25 Mar 2023 14:55:58 -0400 Received: from mail-ot1-x329.google.com (mail-ot1-x329.google.com [IPv6:2607:f8b0:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 89613AD34; Sat, 25 Mar 2023 11:55:37 -0700 (PDT) Received: by mail-ot1-x329.google.com with SMTP id o25-20020a9d4119000000b006a11eb19f8eso1391296ote.5; Sat, 25 Mar 2023 11:55:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1679770537; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=kt1nV0izHo+XQQSqYyOe/0WD7P7tYGip9P1865wg+tY=; b=inVz0XSRlLk1W1rbP83ZhW+h6QqSXDsSY6pY0UA+2M654dZyEEwyxBsc+UcnU0AbIW 2gyMwBud5Ce2EgFauWO8OVuukIalRpQtOm+cmSA/vvkS4nYMqWkjQvKcWgBxMYluSKoe 6qfl5dwESfE8GBkl8/Kuv6lehXHjAJyUhVcNnf5Ce0foper8jv91w1NqZDjHLA3bI6QR uM/TXRhHw8PtPHgVhWqZVG4ggLf0UWsxglfMBp5hEmmgqRI0ie9QTCcD7QEctu9PyZFV pfn/OHj4ukowrYLDLE+TkEK4lYqP4Hxxpt+qS9SHOXZW2HAKr1OEng51wzNGIcczxfr7 RfxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679770537; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kt1nV0izHo+XQQSqYyOe/0WD7P7tYGip9P1865wg+tY=; b=gtwIwT7ixUDULmDSKQ4tUcPHf+4TQk36yZb9UQ5Xn1u7nyAhEslrhpKZDEBGnigCOw 1msd82/hjf2Dx7QcGDu8zQXPEVETyfKCF1KcvW1SdpEwKX44Mke0GoO8JnyHRT+uYV+B mtOGBTcusY0nf0UnMyoYwEo7k3l0SuxJ+mua2As7tLcrdWLqOV71zfIMASbB3Nq9NrD9 bSQbRTz8SAFErCrQEDwWGNU/B9JC/njoN11YXMdPUMtPKHdjfJB9gxQXkv95uYFWeSSk Nhpfz45RkvjhWPfjHxYP8FfLT0QlVrjnn60eEjYs9T2vw8Pp/Zkf0OwH31TeEDIuH2ej U0tg== X-Gm-Message-State: AO0yUKVlF/igD1w2QCW9iWZJVYLJvDXRcgKRXdFR7P7w53ZlOZcH9n5h YpgetIEYx8icSxtwSkhXI4A= X-Google-Smtp-Source: AK7set8DuAMn4XuyM4v6I2K7igcUyRQD0ffc61fKXKcekRHZN9YR6m9+iwxAdj+HdX5Um/FRDRfm1A== X-Received: by 2002:a05:6830:10cc:b0:697:a381:a8f8 with SMTP id z12-20020a05683010cc00b00697a381a8f8mr3217617oto.3.1679770536742; Sat, 25 Mar 2023 11:55:36 -0700 (PDT) Received: from localhost ([12.97.180.36]) by smtp.gmail.com with ESMTPSA id p16-20020a9d76d0000000b0068bd922a244sm10121959otl.20.2023.03.25.11.55.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Mar 2023 11:55:36 -0700 (PDT) From: Yury Norov To: Jakub Kicinski , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yury Norov , Saeed Mahameed , Pawel Chmielewski , Leon Romanovsky , "David S. Miller" , Eric Dumazet , Paolo Abeni , Andy Shevchenko , Rasmus Villemoes , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Tariq Toukan , Gal Pressman , Greg Kroah-Hartman , Heiko Carstens , Barry Song Subject: [RFC PATCH 8/8] sched: drop for_each_numa_hop_mask() Date: Sat, 25 Mar 2023 11:55:14 -0700 Message-Id: <20230325185514.425745-9-yury.norov@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230325185514.425745-1-yury.norov@gmail.com> References: <20230325185514.425745-1-yury.norov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-State: RFC Now that we have for_each_numa_cpu(), for_each_numa_hop_mask() and all related code is a deadcode. Drop it. Signed-off-by: Yury Norov --- This is RFC because despite that the code below is unused, there may be new users, particularly Intel, and I don't want to cut people on the fly. Those interested in for_each_numa_hop_mask(), please send NAKs. include/linux/topology.h | 25 ------------------------- kernel/sched/topology.c | 32 -------------------------------- lib/test_bitmap.c | 13 ------------- 3 files changed, 70 deletions(-) diff --git a/include/linux/topology.h b/include/linux/topology.h index 3d8d486c817d..d2defd59b2d0 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -255,7 +255,6 @@ static inline const struct cpumask *cpu_cpu_mask(int cpu) #ifdef CONFIG_NUMA int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node); int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsigned int *hop); -extern const struct cpumask *sched_numa_hop_mask(unsigned int node, unsigned int hops); #else static __always_inline int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node) { @@ -267,32 +266,8 @@ int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsi { return cpumask_next(cpu, cpus); } - -static inline const struct cpumask * -sched_numa_hop_mask(unsigned int node, unsigned int hops) -{ - return ERR_PTR(-EOPNOTSUPP); -} #endif /* CONFIG_NUMA */ -/** - * for_each_numa_hop_mask - iterate over cpumasks of increasing NUMA distance - * from a given node. - * @mask: the iteration variable. - * @node: the NUMA node to start the search from. - * - * Requires rcu_lock to be held. - * - * Yields cpu_online_mask for @node == NUMA_NO_NODE. - */ -#define for_each_numa_hop_mask(mask, node) \ - for (unsigned int __hops = 0; \ - mask = (node != NUMA_NO_NODE || __hops) ? \ - sched_numa_hop_mask(node, __hops) : \ - cpu_online_mask, \ - !IS_ERR_OR_NULL(mask); \ - __hops++) - /** * for_each_numa_cpu - iterate over cpus in increasing order taking into account * NUMA distances from a given node. diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 5f5f994a56da..2842a4d10624 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -2171,38 +2171,6 @@ int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsi } EXPORT_SYMBOL_GPL(sched_numa_find_next_cpu); -/** - * sched_numa_hop_mask() - Get the cpumask of CPUs at most @hops hops away from - * @node - * @node: The node to count hops from. - * @hops: Include CPUs up to that many hops away. 0 means local node. - * - * Return: On success, a pointer to a cpumask of CPUs at most @hops away from - * @node, an error value otherwise. - * - * Requires rcu_lock to be held. Returned cpumask is only valid within that - * read-side section, copy it if required beyond that. - * - * Note that not all hops are equal in distance; see sched_init_numa() for how - * distances and masks are handled. - * Also note that this is a reflection of sched_domains_numa_masks, which may change - * during the lifetime of the system (offline nodes are taken out of the masks). - */ -const struct cpumask *sched_numa_hop_mask(unsigned int node, unsigned int hops) -{ - struct cpumask ***masks; - - if (node >= nr_node_ids || hops >= sched_domains_numa_levels) - return ERR_PTR(-EINVAL); - - masks = rcu_dereference(sched_domains_numa_masks); - if (!masks) - return ERR_PTR(-EBUSY); - - return masks[hops][node]; -} -EXPORT_SYMBOL_GPL(sched_numa_hop_mask); - #endif /* CONFIG_NUMA */ static int __sdt_alloc(const struct cpumask *cpu_map) diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index 1b5f805f6879..6becb044a66f 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -756,19 +756,6 @@ static void __init test_for_each_numa(void) { unsigned int cpu, node; - for (node = 0; node < sched_domains_numa_levels; node++) { - const struct cpumask *m, *p = cpu_none_mask; - unsigned int c = 0; - - rcu_read_lock(); - for_each_numa_hop_mask(m, node) { - for_each_cpu_andnot(cpu, m, p) - expect_eq_uint(cpumask_local_spread(c++, node), cpu); - p = m; - } - rcu_read_unlock(); - } - for (node = 0; node < sched_domains_numa_levels; node++) { unsigned int hop, c = 0;