Received: by 2002:a25:ca44:0:0:0:0:0 with SMTP id a65csp1752786ybg; Thu, 30 Jul 2020 01:31:48 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxJL3EmjLNOvKEir5b8K2HiGsRyIKBMqUiXWqDIxyJ1t3gzdxto5OAM4x4S93Guqm0NkF25 X-Received: by 2002:a17:906:e10e:: with SMTP id gj14mr1639253ejb.218.1596097908748; Thu, 30 Jul 2020 01:31:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1596097908; cv=none; d=google.com; s=arc-20160816; b=L7rBU9RqrP13rRjxtwSZFIGWDGyNoiYrOqrLeuFnEr05nT9IqGNoVl8WOUnpf0zOVK KjqPZX46kjigL7Etc9SNgCp4T9u7EGsE/sAh7GYs39WIjUMLR5157+iCoUrZOyCT62wZ qNtllnAxkZpBxbmDlgDUU3JcW3qFC5tgwvw3KNIBRCwbGOe224Flx49qhckBl8tB6Q7u SvSoEaB3jqfgW/jHtCAo5cLb2XFhE7rH/z/4Myz3JRXs1YAimPz+NIh7pjG6AcEH2q1E MyX6YHZeOC1SzY6jmn5KOiFyQQ18pE6sGFAx5tWHlT5xlz95psKkJjzoU8ENCoHK5qdm rjXw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=dcCsLLurihXDG2ArxLxOQzE6h/YxXGnUypoiUIrMUPs=; b=aJijZfHQn7bk37BSzKVCBAufJUkvjgzZPhC0lKpYLMmVAgIrs8T3z22ktpEXoOgMu5 E9P2oqLw7Uy9u4l4rX1SlI4xERWCByBwDg+5+yuf1FU8+cKPKy2fLIf5N/ReWg2eRuEA F0ZIz8JQABENmmphtm00viFBXLaXQUCBpvWWCj93tywm0VnZKMpp6fZkQikzmeAyuom7 1faXVh6eFMJGzztvD9IukOSGvveI/HFCDQxTQvMJonNSNlFbVgecy3Wlp3Rpcwiy2VEC /enUVtciCeCIWCSG8/Nrisu1keCFM8XvA7T7F8EHbVUoMilSgwdlgz3VxyqipXHPf/qK 57jw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=vgaIwncX; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id g12si1644948edl.223.2020.07.30.01.31.26; Thu, 30 Jul 2020 01:31:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=vgaIwncX; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729024AbgG3I2y (ORCPT + 99 others); Thu, 30 Jul 2020 04:28:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726819AbgG3I2x (ORCPT ); Thu, 30 Jul 2020 04:28:53 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE681C0619D2 for ; Thu, 30 Jul 2020 01:28:52 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id t15so3802207pjq.5 for ; Thu, 30 Jul 2020 01:28:52 -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=dcCsLLurihXDG2ArxLxOQzE6h/YxXGnUypoiUIrMUPs=; b=vgaIwncXLH76c2vsjopH6VnpXCFwwvIE7id91VfeltlytUTvkT6D8F19YWHHMP7xwr /VeViC12OhIl3n1xQKb6sQDJ/I+mR4iffOgoi8TbCG/SK8pI/8udYIj11dNQ6xXS6oKB QrKDEweLqv/Dba2wvepV6O9G6hv2c6hoaOd2d0WJ11hjyAZyz5adZywiHvFdeCbdhOX1 Yqc1m/hG7M7WVYGEPRUfKHsbSYwRj+DxwDUHeNJnA3wXbw/9QzZ+9miPWuvByLjGnKfV /gSe+TwEovFkQAOWSzSOCGCVBF5o74xWWtGpgWpyhThUyHcwYaK8gAdciEnWXncy8AEM 7+AQ== 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=dcCsLLurihXDG2ArxLxOQzE6h/YxXGnUypoiUIrMUPs=; b=d50klt50h3m1+ayECjfC19PLkBIUvmM1akjYOZK9bXdsILToOId//IkoP85kk93Dq1 Q9LuP49a7KnD8xaFo2QxYtSPWSq+R/jsy6A7qRnnBjLHKJhDXrHpcgi11vb594n3o03M 8Rzd6aiwyRVkmyqJeuNtkwMS+cmi/22qnCi+tID8BAzsddXC2kKncOlkpreqkTCzkv5q jwSoGTcOMqGfZzhM3Je+tehBwWRwfAo7v/Y0pZ1qjfZxCWJpQveqiT8WAnkdLQ2xgfp7 B4incLyXJLMWnMdjwrLRYxeHiJA1DL0uqBZ7i6YvQRhGwllCbAXeZ6wufdcCg/EKnw1R GesA== X-Gm-Message-State: AOAM532pj5FduYq5G6eybvZ/9lCdyd3ox+aMyvb+WDC7CEOEaQDs+F8+ IRtguZEqo7ziGK/xOgajR38= X-Received: by 2002:a17:90a:fe0c:: with SMTP id ck12mr2226712pjb.102.1596097732436; Thu, 30 Jul 2020 01:28:52 -0700 (PDT) Received: from pek-lpggp6.wrs.com (unknown-105-123.windriver.com. [147.11.105.123]) by smtp.gmail.com with ESMTPSA id d29sm5150685pgb.54.2020.07.30.01.28.48 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 30 Jul 2020 01:28:52 -0700 (PDT) From: Kevin Hao To: Steven Rostedt , Ingo Molnar Cc: linux-kernel@vger.kernel.org Subject: [PATCH 2/2] tracing/hwlat: Honor the tracing_cpumask Date: Thu, 30 Jul 2020 16:23:18 +0800 Message-Id: <20200730082318.42584-2-haokexin@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200730082318.42584-1-haokexin@gmail.com> References: <20200730082318.42584-1-haokexin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In calculation of the cpu mask for the hwlat kernel thread, the wrong cpu mask is used instead of the tracing_cpumask, this causes the tracing/tracing_cpumask useless for hwlat tracer. Fixes it. Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Kevin Hao --- kernel/trace/trace_hwlat.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c index ddb528a6cd51..17873e5d0353 100644 --- a/kernel/trace/trace_hwlat.c +++ b/kernel/trace/trace_hwlat.c @@ -283,6 +283,7 @@ static bool disable_migrate; static void move_to_next_cpu(void) { struct cpumask *current_mask = &save_cpumask; + struct trace_array *tr = hwlat_trace; int next_cpu; if (disable_migrate) @@ -296,7 +297,7 @@ static void move_to_next_cpu(void) goto disable; get_online_cpus(); - cpumask_and(current_mask, cpu_online_mask, tracing_buffer_mask); + cpumask_and(current_mask, cpu_online_mask, tr->tracing_cpumask); next_cpu = cpumask_next(smp_processor_id(), current_mask); put_online_cpus(); @@ -372,7 +373,7 @@ static int start_kthread(struct trace_array *tr) /* Just pick the first CPU on first iteration */ get_online_cpus(); - cpumask_and(current_mask, cpu_online_mask, tracing_buffer_mask); + cpumask_and(current_mask, cpu_online_mask, tr->tracing_cpumask); put_online_cpus(); next_cpu = cpumask_first(current_mask); -- 2.26.2