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=-15.8 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,USER_AGENT_GIT 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 2C3F8C433ED for ; Thu, 22 Apr 2021 20:02:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE12C6137D for ; Thu, 22 Apr 2021 20:02:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239313AbhDVUD1 (ORCPT ); Thu, 22 Apr 2021 16:03:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239205AbhDVUDW (ORCPT ); Thu, 22 Apr 2021 16:03:22 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF242C061756 for ; Thu, 22 Apr 2021 13:02:46 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id n2so70588388ejy.7 for ; Thu, 22 Apr 2021 13:02:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Y968Nj9WleLeQTLHRLot9K7vbTHywUm0eD5a13orsj0=; b=FrZzFesBWGW8fpO1qclSAZX0+PB1wPwA/C2iiLSM9Td4MP1rIB/3VYJ4SfJw82dQ6D VMwGBEg107oGJ7d0qDQ15Z93dLaFE2WmmdVgqD13Ucjf2z98IVLoFzI+rJrukrooR5SO vn4AEerNmi3vePhLPcPnG5WFkmvtUeyY6qzgLq8MhgKeF7h01jPKKRJRwSXhatX6B+f6 eqKWNBkX3BR1TmvFsnaoaT3yPDqOmklne23g0z5GKTs1kmKw5OjOirCwQOICIOZ/LKuH nDFMbfydXD8UtgdsNO8xnoZHsXK+vZcBOnEzlABF08wZCqGRkMJ1x/3N/b/x7bC7+1cO bSWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Y968Nj9WleLeQTLHRLot9K7vbTHywUm0eD5a13orsj0=; b=iIDv6jsbdjsoym4VWkw1iFHGKDhTVoZhwcvfNnfnjVVR9yB/zcQfM+yDq7+gHuq9nl tAv8GMtIYE68V8ciNFTVKcSEF9wLPBTDEJNmdam4d5l4mUtjuYH1LyrAxqpncoVV9Bq9 ngDngidaJNa83KxNWBIPuy/X6U9GePCc6OssPkX5P6BiDWSvAvP23x1UTs9TDCMFP5Iy js6kETQyOzoYMiaJpPfSwNPyuqveJenWTgfNPazoECTcpcn66TbxpnHh2C+foaAgdOX3 oXEWJgVOQRDXEXZlKaWzY9txtfjjgwcrD8wWCjRZfYB4amy598AYCdOa3Pck9hAExkMz ZlOA== X-Gm-Message-State: AOAM533QdxJo056B1zUTq2k3F5ucKstPIsT528KkFIiaJHpcFbMlocUj uPa8NUsxGafzO7C6d7X+zw== X-Google-Smtp-Source: ABdhPJyZY7oiYiKfIZQlfp7SVHWYtF5cVoO1AhiQ4yIH3Wlz4IvqgWBsqQM1Sg2Ic44ILH5HyF6fQw== X-Received: by 2002:a17:906:51d5:: with SMTP id v21mr418183ejk.252.1619121765722; Thu, 22 Apr 2021 13:02:45 -0700 (PDT) Received: from localhost.localdomain ([46.53.248.145]) by smtp.gmail.com with ESMTPSA id u15sm2936199edx.34.2021.04.22.13.02.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Apr 2021 13:02:45 -0700 (PDT) From: Alexey Dobriyan To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, Alexey Dobriyan Subject: [PATCH 2/4] sched: make nr_iowait() return 32-bit value Date: Thu, 22 Apr 2021 23:02:26 +0300 Message-Id: <20210422200228.1423391-2-adobriyan@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210422200228.1423391-1-adobriyan@gmail.com> References: <20210422200228.1423391-1-adobriyan@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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(-) diff --git a/fs/proc/stat.c b/fs/proc/stat.c index 941605de7f9a..6561a06ef905 100644 --- 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, diff --git a/include/linux/sched/stat.h b/include/linux/sched/stat.h index f742229091ec..8a5b27ae7937 100644 --- 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); extern unsigned int nr_running(void); extern bool single_task_running(void); -extern unsigned long nr_iowait(void); +extern unsigned int nr_iowait(void); extern unsigned long nr_iowait_cpu(int cpu); static inline int sched_info_on(void) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 713ea35cb995..2cc8d81cdc75 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4413,9 +4413,9 @@ 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); -- 2.30.2