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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 31075C433E0 for ; Wed, 27 May 2020 14:29:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 02E7C20873 for ; Wed, 27 May 2020 14:29:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590589757; bh=p8Tj4T6e9pm5BQbrEyV7XK+iFSEGbui3AwBFj4blceg=; h=From:To:Cc:Subject:Date:List-ID:From; b=FebAZoaZyKt0MiRFzoVopihevD2flL0Ka7GPdBIcVRqfNnIDpbm8PZQH6psfI+J7R +FqHwdHoCSY2IH9vYOu2ijz8VsYdfp3W/XHwNFolLq61AkQJDhhC8WjQk8MW46AdEf YL0Fww5IAjdfEi6gOqh0VZqCfKDNeanzYTrv9t7w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389234AbgE0O3Q (ORCPT ); Wed, 27 May 2020 10:29:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:37244 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389189AbgE0O3Q (ORCPT ); Wed, 27 May 2020 10:29:16 -0400 Received: from lenoir.home (lfbn-ncy-1-324-171.w83-196.abo.wanadoo.fr [83.196.159.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D4B3C2084C; Wed, 27 May 2020 14:29:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590589755; bh=p8Tj4T6e9pm5BQbrEyV7XK+iFSEGbui3AwBFj4blceg=; h=From:To:Cc:Subject:Date:From; b=ux0TYu03syUIz1ubSQgIGXiP5Y370WG2Qcyl9S+/O5ULPYyuzx6YA5CpCUdwNjiDC SOX6HltyzHxMIGJPGXEdMItr5cev8fATzx9l0kqXCcGGu5a0eixYoiJSkRfy1PDCtr IEcHJftQX09xblvNl41NlQubQDhLyS+uw0MbRiCo= From: Frederic Weisbecker To: Peter Zijlstra , Ingo Molnar Cc: LKML , Frederic Weisbecker , Thomas Gleixner , Andrew Morton , Christoph Lameter , Chris Friesen , Marcelo Tosatti , Jim Somerville Subject: [PATCH 0/2] sched/isolation: Isolate unbound kthreads Date: Wed, 27 May 2020 16:29:07 +0200 Message-Id: <20200527142909.23372-1-frederic@kernel.org> X-Mailer: git-send-email 2.26.2 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 Kthreads are harder to affine and isolate than user tasks. They can't be placed inside cgroups/cpusets and the affinity for any newly created kthread is always overriden from the inherited kthreadd's affinity to system wide. Take that into account for nohz_full. git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git sched/core HEAD: 774258ad06e832e9fbdcf681225d2c29421a100f Thanks, Frederic --- Marcelo Tosatti (2): kthread: Switch to cpu_possible_mask isolcpus: Affine unbound kernel threads to housekeeping cpus include/linux/sched/isolation.h | 1 + kernel/kthread.c | 6 ++++-- kernel/sched/isolation.c | 3 ++- 3 files changed, 7 insertions(+), 3 deletions(-)