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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 97E5BC3A5A3 for ; Wed, 28 Aug 2019 01:19:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B26820856 for ; Wed, 28 Aug 2019 01:19:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QRMhGeFp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726541AbfH1BTI (ORCPT ); Tue, 27 Aug 2019 21:19:08 -0400 Received: from mail-qt1-f196.google.com ([209.85.160.196]:41244 "EHLO mail-qt1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726111AbfH1BTG (ORCPT ); Tue, 27 Aug 2019 21:19:06 -0400 Received: by mail-qt1-f196.google.com with SMTP id i4so1146667qtj.8; Tue, 27 Aug 2019 18:19:06 -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=fD7GsM1ydbBIc5H/Xp89rOJflMYNEvnB2/MRHbI69S8=; b=QRMhGeFp8E+iLwoI4p4NieVsiHbGPCo+Y/WZdZIiecEjiLHKHq6IvH/pwedv027qGP 0I0k1SYUvI0/Mr0bGTI79m4D0moX7yCHUaUjDYV5Xer9U9A4VZd7VoftRtW7gMF2X2aK IfkVWSafj1h8bZc+aFSNCG+1N0JMw3/Pt9fG6J/i5ooL4xiG4FiKKzdesXfRSJCIK/aJ 1YHiM+By1mADl21uaRELp0K9H9C//q3ByfPg6Zl9wUG1LtPobhSMIDK29zFcewDlY90U L5/jRIdBXu/wXv/rt7Io7/fQ0YCtApK7PQ1VwZrelvXiHgfRrmQ4lrbzat04cghI0TwY 5FIQ== 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=fD7GsM1ydbBIc5H/Xp89rOJflMYNEvnB2/MRHbI69S8=; b=S1F6ocrg4ECVOYbr1xAsGZqrs55vNJrdBZvRvTXb1gLiVKdVM5Y/h/7EPcIa5D0Lbf s1IlMOE1217nryE0mcjp6qKmniZXW2xJsXAyOrX6WD70eux55WqxapFY7Ni2FuR89k0/ lN7dpM4DdVtS4dr06udd4zLQYX8OiTUyfO/k2LaQEMpfKyDpuqmou2B2K0ExuPPr8ibX kp6s1vbhFjEAlT7dYUwG7sgtVjt6Ad31jtPX8mN/vz3gSCTgYzIcHh2Oo7vq14s5j6oZ 02/XIScGBRPbjjp3UH6YAMui5chRhirwLCf1oWiQQa6iM2J1yLyqm1rM8ltyiaNcdDjM y97w== X-Gm-Message-State: APjAAAX8llslBXXAEp2+63JWNKDJC2dZoEaHgUSB62CtRx3jMTq3eaTI ojpbFglH9oXsbzUa7kbNQXcwmB9a+FY= X-Google-Smtp-Source: APXvYqzMv3pK2nJ5k3zebxy6Wpcd7cSlAdka0+OqyFn3RmJu8WTFta9pUnfB6ybI37jNk6VVbCcXXQ== X-Received: by 2002:a05:6214:1447:: with SMTP id b7mr1191403qvy.89.1566955145144; Tue, 27 Aug 2019 18:19:05 -0700 (PDT) Received: from localhost.localdomain ([186.212.48.84]) by smtp.gmail.com with ESMTPSA id c201sm499231qke.128.2019.08.27.18.19.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2019 18:19:04 -0700 (PDT) From: Marcos Paulo de Souza To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, axboe@kernel.dk Cc: Marcos Paulo de Souza , Hannes Reinecke Subject: [RESEND PATCH 4/4] Documentation:kernel-per-CPU-kthreads.txt: Remove reference to elevator= Date: Tue, 27 Aug 2019 22:19:30 -0300 Message-Id: <20190828011930.29791-5-marcos.souza.org@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190828011930.29791-1-marcos.souza.org@gmail.com> References: <20190828011930.29791-1-marcos.souza.org@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 This argument was not being considered since blk-mq was set by default, so removed this documentation to avoid confusion. Signed-off-by: Marcos Paulo de Souza Reviewed-by: Hannes Reinecke --- Documentation/kernel-per-CPU-kthreads.txt | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/Documentation/kernel-per-CPU-kthreads.txt b/Documentation/kernel-per-CPU-kthreads.txt index 5623b9916411..c68c6c8c26a4 100644 --- a/Documentation/kernel-per-CPU-kthreads.txt +++ b/Documentation/kernel-per-CPU-kthreads.txt @@ -274,9 +274,7 @@ To reduce its OS jitter, do any of the following: (based on an earlier one from Gilad Ben-Yossef) that reduces or even eliminates vmstat overhead for some workloads at https://lkml.org/lkml/2013/9/4/379. - e. Boot with "elevator=noop" to avoid workqueue use by - the block layer. - f. If running on high-end powerpc servers, build with + e. If running on high-end powerpc servers, build with CONFIG_PPC_RTAS_DAEMON=n. This prevents the RTAS daemon from running on each CPU every second or so. (This will require editing Kconfig files and will defeat @@ -284,12 +282,12 @@ To reduce its OS jitter, do any of the following: due to the rtas_event_scan() function. WARNING: Please check your CPU specifications to make sure that this is safe on your particular system. - g. If running on Cell Processor, build your kernel with + f. If running on Cell Processor, build your kernel with CBE_CPUFREQ_SPU_GOVERNOR=n to avoid OS jitter from spu_gov_work(). WARNING: Please check your CPU specifications to make sure that this is safe on your particular system. - h. If running on PowerMAC, build your kernel with + g. If running on PowerMAC, build your kernel with CONFIG_PMAC_RACKMETER=n to disable the CPU-meter, avoiding OS jitter from rackmeter_do_timer(). -- 2.22.0