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 X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6630C433DB for ; Sat, 6 Feb 2021 15:23:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7112B64E86 for ; Sat, 6 Feb 2021 15:23:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230035AbhBFPXP (ORCPT ); Sat, 6 Feb 2021 10:23:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229529AbhBFPXM (ORCPT ); Sat, 6 Feb 2021 10:23:12 -0500 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3BDEAC06174A for ; Sat, 6 Feb 2021 07:22:32 -0800 (PST) Received: by mail-ej1-x62d.google.com with SMTP id w2so17650985ejk.13 for ; Sat, 06 Feb 2021 07:22:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=UQstEu2a0rN7v2mV2gvbL2rYIqiyp6eQv1p8OhNKE8M=; b=IIGjPdf2EwGqckcx1EHB+DZpaQkdDc0oNOkldTOwwz2RMxi4xXvtWuLXsrqMnDdvMf Wjso6x1c4oIe+5rS6jlb1Hpg5JInj4qItVizVtzMCxpjupVR4PVmWzopyCRKEWgM3iHU 9pQu32BfkJrdUlDfmBEYELSFQtsgwRCxf091X5woSHWJY9IAPymRkjssnd+CL/NtFGLn JWqcvNZbBfxS2m3VFCRjLdU6d+OQ7z7zhEIy0P/H3Ph69ITG/Q3OSSgYw4jdoxbZYjZG NqPAwxWsJmueIm3N33kzAGaozarCv19d7f1M89F0sLLEgHqXQEi9T20YClhMwIDls7aa 0h9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=UQstEu2a0rN7v2mV2gvbL2rYIqiyp6eQv1p8OhNKE8M=; b=hv0uQMnNYThk4auUiZMda8DR7FtBqJtajj2SUIM9cWM0S9/XhCB7P0eYvCWwm2QKt+ Bj6EcmPyBunR+jEft3WywuCMDuuK9I/91w5STemNNzjmdNNpDlmuV0nHJCx2QbsmzO54 gFmsxukGAoQtV2NppM7pYIpMt+WlrRwDZcVwJRN6NORPeSqnjVNiwNaMjYqbGozK2UVm Tw3NLloEOxTmDeBcYqcCcN5SGPsiKXmaJ/jSYPzy6XkEC+dRSwGiufgzkH1fQAg4Y0/I 5Y6YVQ0uK+OTLd4MPgTCl7ppMcPdWrK0+4/7YolQtJX87pfXfsjEFQvISEuUaSB3HoR1 w3TA== X-Gm-Message-State: AOAM531OZlexcJFpqqR5v2PX4n5i7uwpnPUg/7rRY2W/pdV4KdAaoQgx 6AZ+HP4hKqAcovzrYEAmlQ== X-Google-Smtp-Source: ABdhPJxYnNHnsgAdu1WMt2BrZLSz5Q1opX+vrQnm+uTQf96Kj4A91Nz0edwto1HK2v8DpcZH+B/tnQ== X-Received: by 2002:a17:906:a091:: with SMTP id q17mr9568531ejy.286.1612624950969; Sat, 06 Feb 2021 07:22:30 -0800 (PST) Received: from localhost.localdomain ([46.53.252.141]) by smtp.gmail.com with ESMTPSA id w26sm54863edq.46.2021.02.06.07.22.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Feb 2021 07:22:30 -0800 (PST) Date: Sat, 6 Feb 2021 18:22:29 +0300 From: Alexey Dobriyan To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 3/5] sched: make nr_iowait() return 32-bit value Message-ID: <20210206152229.GC487103@localhost.localdomain> References: <20210206151832.GA487103@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210206151832.GA487103@localhost.localdomain> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Creating 2**32 tasks to wait in D-state is impossible and wasteful. Return "unsigned int" and save on REX prefixes. Signed-off-by: Alexey Dobriyan --- fs/proc/stat.c | 2 +- include/linux/sched/stat.h | 2 +- kernel/sched/core.c | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-) --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -201,7 +201,7 @@ static int show_stat(struct seq_file *p, void *v) "btime %llu\n" "processes %lu\n" "procs_running %u\n" - "procs_blocked %lu\n", + "procs_blocked %u\n", nr_context_switches(), (unsigned long long)boottime.tv_sec, total_forks, --- a/include/linux/sched/stat.h +++ b/include/linux/sched/stat.h @@ -18,7 +18,7 @@ DECLARE_PER_CPU(unsigned long, process_counts); extern int nr_processes(void); unsigned int nr_running(void); extern bool single_task_running(void); -extern unsigned long nr_iowait(void); +unsigned int nr_iowait(void); extern unsigned long nr_iowait_cpu(int cpu); static inline int sched_info_on(void) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4418,9 +4418,9 @@ unsigned long nr_iowait_cpu(int cpu) * Task CPU affinities can make all that even more 'interesting'. */ -unsigned long nr_iowait(void) +unsigned int nr_iowait(void) { - unsigned long i, sum = 0; + unsigned int i, sum = 0; for_each_possible_cpu(i) sum += nr_iowait_cpu(i);