From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752726AbeBHSAS (ORCPT ); Thu, 8 Feb 2018 13:00:18 -0500 Received: from mail.kernel.org ([198.145.29.99]:51218 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752702AbeBHSAP (ORCPT ); Thu, 8 Feb 2018 13:00:15 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 510DF217B4 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: LKML Cc: Frederic Weisbecker , Peter Zijlstra , Chris Metcalf , Thomas Gleixner , Luiz Capitulino , Christoph Lameter , "Paul E . McKenney" , Ingo Molnar , Wanpeng Li , Mike Galbraith , Rik van Riel Subject: [PATCH 6/6] sched/isolation: Tick offload documentation Date: Thu, 8 Feb 2018 18:59:39 +0100 Message-Id: <1518112779-30196-7-git-send-email-frederic@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518112779-30196-1-git-send-email-frederic@kernel.org> References: <1518112779-30196-1-git-send-email-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org 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 39ac9d4..c851e41 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1762,7 +1762,11 @@ 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