From mboxrd@z Thu Jan 1 00:00:00 1970 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 93F66C433F5 for ; Fri, 11 Feb 2022 00:35:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346396AbiBKAfr (ORCPT ); Thu, 10 Feb 2022 19:35:47 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:60756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245125AbiBKAfn (ORCPT ); Thu, 10 Feb 2022 19:35:43 -0500 Received: from mail-qt1-x835.google.com (mail-qt1-x835.google.com [IPv6:2607:f8b0:4864:20::835]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2D685F66 for ; Thu, 10 Feb 2022 16:35:43 -0800 (PST) Received: by mail-qt1-x835.google.com with SMTP id o3so7353855qtm.12 for ; Thu, 10 Feb 2022 16:35:43 -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=OWAdmxyB++0+PrjBMyb2j1q4M+ZTDvPBI87BwMKOTA4=; b=px25tVfseTRg17nKrinckLpm5Os6T2EDwYc8LKgshVBbe8wsdoAH40zqblIKerCD/M 9FOLPx46bt7sHkinZB7cbxFBdikM66T7mIE2f+XeWCQEEWgZ6+Fj8c60iMtssJ2j4Ax5 ywQwibJ3q+gTnIvO+B0epbOGU2k7wcFwtAmB2Ekl9ZcADK2LwleSSxyJRs3DD/O5DZ2q 3TtJYkbVmKfY7d2ve4Ep5xreuUGke1oZrOtsnTBOvbkyt9qrnwapvEabYRk+An2u5fDB srQ7MLPu2N9T8Fk0fsc3+eu95bT6srOmeEd1PY3YKp7ljCULaG+YIorAkRi025pE/HtS At7Q== 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=OWAdmxyB++0+PrjBMyb2j1q4M+ZTDvPBI87BwMKOTA4=; b=Nqair/vDeS2BUuKINeYHkwBe78SI351hrXzh/AMoNbldp6hcS9CA8MWJ3vOOe0Tegp rrUk0+sWHcPXBmCaWv1VrQnLaz1sE9Bqes5TT8gug6T4GGSnq0D3M4WakkHIEpIEDTmz jawHYWnCQF0c+ZuqCBOwjxx1gSLa37Q7ZIOuWtI9daXZqD7GbBHgHHQuQFBSkUDaNKOV zDWMwMXtcpxaOrd3qTaQWZChzEW2qtRfoqF9FooSqy9AuwxWkuQB6QDZ76HDVYOl/whZ ZCJWOMe3no0XTQZGaNlnpAIcgLn0hXBFloQEAIt3z1Tsv4NOilhpg0pufYSmu7YaTmLL mfNQ== X-Gm-Message-State: AOAM533zG5zuN1evAY5B2mKOsLNkeaT/1CfjbK4NV05k46qH7zAf1OUW Blq0NAv1vKoz6myCjSVeko4= X-Google-Smtp-Source: ABdhPJwKE/7L+78ImyHSzKItwQ+7D0kCNRZ6HRgstwY/P0UGJdT1+mnItTy7cbAEdrMnsxIjkAmO9Q== X-Received: by 2002:ac8:5747:: with SMTP id 7mr6794649qtx.95.1644539742833; Thu, 10 Feb 2022 16:35:42 -0800 (PST) Received: from localhost ([12.28.44.171]) by smtp.gmail.com with ESMTPSA id k13sm11581386qko.45.2022.02.10.16.35.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Feb 2022 16:35:42 -0800 (PST) From: Yury Norov To: Yury Norov , Andy Shevchenko , Rasmus Villemoes , Andrew Morton , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Greg Kroah-Hartman , Peter Zijlstra , David Laight , Joe Perches , Dennis Zhou , Emil Renner Berthing , Nicholas Piggin , Matti Vaittinen , Alexey Klimov , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 47/49] nodemask: add num_node_state_eq() Date: Thu, 10 Feb 2022 14:49:31 -0800 Message-Id: <20220210224933.379149-48-yury.norov@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220210224933.379149-1-yury.norov@gmail.com> References: <20220210224933.379149-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Page allocator uses 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 (or is not) 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 cface1d38093..897e64b66ca4 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -8434,7 +8434,7 @@ 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 -- 2.32.0