From patchwork Sat Dec 18 21:20:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yury Norov X-Patchwork-Id: 12686349 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 21888C43217 for ; Sat, 18 Dec 2021 21:21:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234756AbhLRVVm (ORCPT ); Sat, 18 Dec 2021 16:21:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234576AbhLRVVC (ORCPT ); Sat, 18 Dec 2021 16:21:02 -0500 Received: from mail-oo1-xc31.google.com (mail-oo1-xc31.google.com [IPv6:2607:f8b0:4864:20::c31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2B82C06175B; Sat, 18 Dec 2021 13:20:53 -0800 (PST) Received: by mail-oo1-xc31.google.com with SMTP id w15-20020a4a354f000000b002d85ef0533dso1840212oog.7; Sat, 18 Dec 2021 13:20:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=8sQyawONQ80DXJHmSDH3px/iwXnd508qWqR9G9S67zc=; b=Y7D3jg2nDdCluAFdaTzJ62WKeS2c+dtTaPmJUlV/zLE1aSF//0E3P38R+G4jEFET14 xlE85wW7isyGuED/jOFVFQvwYzXv8BywpI00ruh0C9/BSkGpvfRpAFWq2F7h9v3+T5Il nblHP1zg9vVDXpyvwm44ndVFUUN5IjDhNlidNZbD5SDaUDw8vepg+0zNLqjNDTZ/05Nb X9u9YW1l3M1V6kBMEhcffptynzQERZgT84KYgY25ZHoJxBBze+XJLuZ0xAF092dd7tRz 6Y9FD4MNstMB4NsMQkO+4hI6cQ1T/LuAF9uOZ/g+OPTNQBpwcWpSAFUUj7M8IYKHH6om iwjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=8sQyawONQ80DXJHmSDH3px/iwXnd508qWqR9G9S67zc=; b=mXDr7iwrhQX9onx1gYG5HkgExFGNdAWltAsL5MC1afhsgJjHpSCSADehRTL7kugmFI kAYX8r/K2BNIPSzwnAAwPTlRFuIV+JwLR2gLaBz3JOaa6gz9hTiFJsPPRnN8V4GmxnxS w7hTHrR4zIyAQpdWRCinqUjszIv0oS7r+FdVB3YR91sfLO/UYyRFBl0s91HRMyloOgnD m5Oa3aeruVv0OHe06TVhdrz6XhuB+PPGm2aoJVhMSvwSnZ+XcUTGn2QpAmvWVxHGbseB jsBnO9Sg03mMycKPNyb6h2UY8vF576YB9oAT2ug8Y7FsDItr5RyTtj/hSo1m1GtRUHBU p8gw== X-Gm-Message-State: AOAM533aasKMUg+MIkvSiNXwUlYcRJ/iWLZS3d7yWcepAjWRF/aa9hCl aTJSWMQK4W/UuFQ8uIdM6h5rPyj5BWFYFw== X-Google-Smtp-Source: ABdhPJzvMncW7wCzGcCD5Uph699Rv7l1timnKLBDwWV9dbECCxOkiUPt5sqsHR2cKsTF/R/b2ELz2Q== X-Received: by 2002:a4a:acca:: with SMTP id c10mr5895528oon.1.1639862452856; Sat, 18 Dec 2021 13:20:52 -0800 (PST) Received: from localhost (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id q10sm2488824oiw.17.2021.12.18.13.20.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Dec 2021 13:20:52 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, Yury Norov , "James E.J. Bottomley" , "Martin K. Petersen" , =?utf-8?b?TWljaGHFgiBN?= =?utf-8?b?aXJvc8WCYXc=?= , "Paul E. McKenney" , "Rafael J. Wysocki" , Alexander Shishkin , Alexey Klimov , Amitkumar Karwar , Andi Kleen , Andrew Lunn , Andrew Morton , Andy Gross , Andy Lutomirski , Andy Shevchenko , Anup Patel , Ard Biesheuvel , Arnaldo Carvalho de Melo , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christoph Hellwig , Christoph Lameter , Daniel Vetter , Dave Hansen , David Airlie , David Laight , Dennis Zhou , Emil Renner Berthing , Geert Uytterhoeven , Geetha sowjanya , Greg Kroah-Hartman , Guo Ren , Hans de Goede , Heiko Carstens , Ian Rogers , Ingo Molnar , Jakub Kicinski , Jason Wessel , Jens Axboe , Jiri Olsa , Joe Perches , Jonathan Cameron , Juri Lelli , Kees Cook , Krzysztof Kozlowski , Lee Jones , Marc Zyngier , Marcin Wojtas , Mark Gross , Mark Rutland , Matti Vaittinen , Mauro Carvalho Chehab , Mel Gorman , Michael Ellerman , Mike Marciniszyn , Nicholas Piggin , Palmer Dabbelt , Peter Zijlstra , Petr Mladek , Randy Dunlap , Rasmus Villemoes , Russell King , Saeed Mahameed , Sagi Grimberg , Sergey Senozhatsky , Solomon Peachy , Stephen Boyd , Stephen Rothwell , Steven Rostedt , Subbaraya Sundeep , Sudeep Holla , Sunil Goutham , Tariq Toukan , Tejun Heo , Thomas Bogendoerfer , Thomas Gleixner , Ulf Hansson , Vincent Guittot , Vineet Gupta , Viresh Kumar , Vivien Didelot , Vlastimil Babka , Will Deacon , bcm-kernel-feedback-list@broadcom.com, kvm@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 11/17] lib/nodemask: add num_node_state_eq() Date: Sat, 18 Dec 2021 13:20:07 -0800 Message-Id: <20211218212014.1315894-12-yury.norov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211218212014.1315894-1-yury.norov@gmail.com> References: <20211218212014.1315894-1-yury.norov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Kernel code calls num_node_state() to compare number of nodes with a given number. The underlying code calls bitmap_weight(), and we can do it more efficiently with num_node_state_eq because conditional nodes_weight may stop traversing the nodemask earlier, as soon as condition is met. Signed-off-by: Yury Norov --- include/linux/nodemask.h | 5 +++++ mm/page_alloc.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index 197598e075e9..c5014dbf3cce 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -466,6 +466,11 @@ static inline int num_node_state(enum node_states state) return nodes_weight(node_states[state]); } +static inline int num_node_state_eq(enum node_states state, int num) +{ + return nodes_weight_eq(node_states[state], num); +} + #define for_each_node_state(__node, __state) \ for_each_node_mask((__node), node_states[__state]) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index edfd6c81af82..71f5652828b8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -8323,7 +8323,7 @@ void __init page_alloc_init(void) int ret; #ifdef CONFIG_NUMA - if (num_node_state(N_MEMORY) == 1) + if (num_node_state_eq(N_MEMORY, 1)) hashdist = 0; #endif