Received: by 10.223.176.46 with SMTP id f43csp194204wra; Thu, 18 Jan 2018 16:05:09 -0800 (PST) X-Google-Smtp-Source: ACJfBou5n4Lan1O9gqpFfmgxKYhTu/lav/Agh+50crj5/v/kqY3fpqn4t0Rc9Jle0nXzff4qdSed X-Received: by 2002:a17:902:9a9:: with SMTP id 38-v6mr607140pln.202.1516320309175; Thu, 18 Jan 2018 16:05:09 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1516320309; cv=none; d=google.com; s=arc-20160816; b=T3IhO9DlZk8VGZw3vPk8n/HUEUxqfNj5q8PU7fUN2vZrY0JEjtwbGwbCkJnyZ50KO4 ddvUQx6+fAo67rImIVAmx5tjCSj4s9foO9FtG8ZzzzzPOWniLAED4fme7F3tHwnIOVsd yBOVc5BruuTPkn+VAGkvQNcaF7Zr8Z7E1msurKFRatGGhvddd7SFgRWO1lk1rYmhcfqN FPuMeLHj1nzH6Mh+4ZgHv0ecWuE3bxio5Ya2eGzaXxBRmeMjRmEUErHC/5obgbgTriFu rDFg1d8u6PotAIK/kpn2jI6gLrS+rX2O/0yUsE7sWNk2hOzPJU24bzt1+8rkk3qh/lLF XEqw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dmarc-filter:arc-authentication-results; bh=5YPlzOYqNYgq7n3VqwYGcC04hAFQXTmqipXdW77SX7A=; b=oubkrEBEnbNd//ldCAu5Pd5Q4QuCYlum+P+30UUIdduM0djru+LM4KsD9UPSu5C/X9 8egaq3ZHdLu+gl13F1bxHPNGYQQn3lIOrMsqbipzaGaHMk2V1JWTPQbLy693VOsdu7Tq p0kzB3ITplDC7Q2crw116PQ2OpQHbXk8ukdg8WWSDiX6KbgIqJE6/Ggxc3Q36Ja1hcik TxSuKgGF/Wtki8WIgb40pCL9nOdj92AMfPYI4pDIz0IzMj30e2CCszBE0tLA8m0yIMMK VzTyDSNugRawkJ1gi96JE6twhmwqgu7Z11WwFMFe05xa8jfqBH+i9zs+/MjbCN5X/S1t NxGg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id s77si8174459pfa.172.2018.01.18.16.04.55; Thu, 18 Jan 2018 16:05:09 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755263AbeASAD3 (ORCPT + 99 others); Thu, 18 Jan 2018 19:03:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:39234 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755130AbeASADF (ORCPT ); Thu, 18 Jan 2018 19:03:05 -0500 Received: from localhost.localdomain (i16-les03-th2-31-37-47-191.sfr.lns.abo.bbox.fr [31.37.47.191]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0188A21770; Fri, 19 Jan 2018 00:02:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0188A21770 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=frederic@kernel.org From: Frederic Weisbecker To: Ingo Molnar Cc: LKML , Frederic Weisbecker , Peter Zijlstra , Chris Metcalf , Thomas Gleixner , Luiz Capitulino , Christoph Lameter , "Paul E . McKenney" , Wanpeng Li , Mike Galbraith , Rik van Riel Subject: [PATCH 6/6] sched/isolation: Tick offload documentation Date: Fri, 19 Jan 2018 01:02:20 +0100 Message-Id: <1516320140-13189-7-git-send-email-frederic@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1516320140-13189-1-git-send-email-frederic@kernel.org> References: <1516320140-13189-1-git-send-email-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the documentation to reflect the 1Hz tick offload changes. Signed-off-by: Frederic Weisbecker Cc: Chris Metcalf Cc: Christoph Lameter Cc: Luiz Capitulino Cc: Mike Galbraith Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Rik van Riel Cc: Thomas Gleixner Cc: Wanpeng Li Cc: Ingo Molnar --- Documentation/admin-guide/kernel-parameters.txt | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 46b26bf..534afb1 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1746,7 +1746,11 @@ specified in the flag list (default: domain): nohz - Disable the tick when a single task runs. + Disable the tick when a single task runs. A residual 1Hz + tick is offloaded to workqueues that you need to affine + to housekeeping through the sysfs file + /sys/devices/virtual/workqueue/cpumask or using the below + domain flag. domain Isolate from the general SMP balancing and scheduling algorithms. Note that performing domain isolation this way -- 2.7.4