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 7B9AAC433E0 for ; Sat, 6 Feb 2021 15:21:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 386EE64E87 for ; Sat, 6 Feb 2021 15:21:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230244AbhBFPVi (ORCPT ); Sat, 6 Feb 2021 10:21:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229586AbhBFPVf (ORCPT ); Sat, 6 Feb 2021 10:21:35 -0500 Received: from mail-ej1-x635.google.com (mail-ej1-x635.google.com [IPv6:2a00:1450:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11789C06174A for ; Sat, 6 Feb 2021 07:20:55 -0800 (PST) Received: by mail-ej1-x635.google.com with SMTP id i8so17688686ejc.7 for ; Sat, 06 Feb 2021 07:20:54 -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=1fKZa5ef0f/JsVVxwPS0Mh8EDmKSue5flkLbzWhoGFo=; b=gewUvIBfuJ12n1zR6WfvJXluAVgtkbZhNYVrfF5HLgH+2LyFsYnDUVvsT5Y9Do2Sto XIOsDCZKut6H2gcpnvsZHXXwWadaXtUq0gqn8QpOEDGYkS7XocZzz2EHqeK4bVatTCgH 7XmSDlLHuKL0DwGvnWpyyjlSvG6KScH5RhNPU4wfBTW7b2PiVmehRtSJgIimEgnS/yu0 gprFfEm77NL59+g+nDC04iWSYkICkqqqVMWzTLJTJBMF2dUVk5AzXkbwORaSY3kB57m3 ZyaeXHH9HUpl0lUN3k0QIauxqoIXHGKSq20gkQFZ1JSAUvIY/kY7DJ6c73A9PsyWiH7q gzdg== 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=1fKZa5ef0f/JsVVxwPS0Mh8EDmKSue5flkLbzWhoGFo=; b=Q/QbbDdIostqRL1gvmYFYKALp3USgJDEUxtNbQ/W84Se1tLIY6wtMxw+8eAczGGmky YHFq7w3j6ozqBlUhwsPKcEvQ2YfoGHOu1WDvpcm6c35OtfEe52KmfdZ2hYdQK5y3dVDK AQ3wkpCNhIRDKs11/IVp7zNqePtpuZjHdlzYPY2gAuQdELOBkK6szHcMRCszvX40Cdzp K4eoVm8Nkxbrfb0D8freohN4/WGz0xT19P4AbyjNCf4vDauzL1X2TwpPt1wY0s3JRoRo EIMfgeoxgYMY1bYdYSZWkTqABLTJjGyE7++K8p1HMataHzID0orzXrl1lgh+R5M4TR2r 4+jw== X-Gm-Message-State: AOAM532BsJuCinWOglzwlYgZ3OUjYptXSTf+wUOA56NYFnyZnoKkMeqp +6kCS816q8Nfff2nyKRg3g== X-Google-Smtp-Source: ABdhPJwfjqNJLF49YcoDKAvxGoF/vQBz5lbD5VDKtWwf3zFjgGnDo0BPbVEA5ZugGtAtRrDZg1ASLQ== X-Received: by 2002:a17:906:3685:: with SMTP id a5mr9173646ejc.544.1612624853870; Sat, 06 Feb 2021 07:20:53 -0800 (PST) Received: from localhost.localdomain ([46.53.252.141]) by smtp.gmail.com with ESMTPSA id f6sm2842098edr.72.2021.02.06.07.20.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Feb 2021 07:20:53 -0800 (PST) Date: Sat, 6 Feb 2021 18:20:51 +0300 From: Alexey Dobriyan To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 2/5] sched: make nr_running() return 32-bit Message-ID: <20210206152051.GB487103@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 run is impossible due to futex pid limits and wasteful anyway. Nobody have done it. Bring nr_running() into 32-bit world to save on REX prefixes. Signed-off-by: Alexey Dobriyan --- fs/proc/loadavg.c | 2 +- fs/proc/stat.c | 2 +- include/linux/sched/stat.h | 2 +- kernel/sched/core.c | 4 ++-- 4 files changed, 5 insertions(+), 5 deletions(-) --- a/fs/proc/loadavg.c +++ b/fs/proc/loadavg.c @@ -16,7 +16,7 @@ static int loadavg_proc_show(struct seq_file *m, void *v) get_avenrun(avnrun, FIXED_1/200, 0); - seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n", + seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %d/%d %d\n", LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]), LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]), LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]), --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -200,7 +200,7 @@ static int show_stat(struct seq_file *p, void *v) "\nctxt %llu\n" "btime %llu\n" "processes %lu\n" - "procs_running %lu\n" + "procs_running %u\n" "procs_blocked %lu\n", nr_context_switches(), (unsigned long long)boottime.tv_sec, --- a/include/linux/sched/stat.h +++ b/include/linux/sched/stat.h @@ -16,7 +16,7 @@ extern unsigned long total_forks; extern int nr_threads; DECLARE_PER_CPU(unsigned long, process_counts); extern int nr_processes(void); -extern unsigned long nr_running(void); +unsigned int nr_running(void); extern bool single_task_running(void); extern unsigned long nr_iowait(void); extern unsigned long nr_iowait_cpu(int cpu); --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4336,9 +4336,9 @@ context_switch(struct rq *rq, struct task_struct *prev, * externally visible scheduler statistics: current number of runnable * threads, total number of context switches performed since bootup. */ -unsigned long nr_running(void) +unsigned int nr_running(void) { - unsigned long i, sum = 0; + unsigned int i, sum = 0; for_each_online_cpu(i) sum += cpu_rq(i)->nr_running;