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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 DA6DAC433E0 for ; Thu, 4 Jun 2020 13:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A1A88206C3 for ; Thu, 4 Jun 2020 13:16:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="j78Bd4eP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728385AbgFDNQd (ORCPT ); Thu, 4 Jun 2020 09:16:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726205AbgFDNQd (ORCPT ); Thu, 4 Jun 2020 09:16:33 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 799E0C08C5C0 for ; Thu, 4 Jun 2020 06:16:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=WVE3qPA0O7uuxoPXLbzFwIQgphyDorNlT9Drp/WwwVs=; b=j78Bd4eP3yPf0Ni1GgjgVPR16M AImmiR1clxiLOn+NvhhkDmiqtFvr7PBLojAEIgPB5+Ta/Di8k4nw9cyVpbd6ZZ8e7udIWTAxvWbEV apVPK16HpQEqZWXgu5E3o7+7NBVWyAjfPYGtgFMPj4a2doCST1fnX67QIS8yMzMEgPnk0HJkSsCfj 4FkA0qwn4XsNitVXHyTbvAVyiHXk519tC8h0DsxIwOKjnSDAujn2cyss+4oc69mz0wmZlpKjMuX0a T0Ty1ioYFdMUDUt6/6u3h23LTkcL1byH8KiwSg3cA/Eipg83cm0YtgGSbpto/kYrtsb4b7SV71sWM /57wLE1Q==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jgpjR-0006y4-SH; Thu, 04 Jun 2020 13:16:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id AE200301ABC; Thu, 4 Jun 2020 15:16:27 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 9855020086132; Thu, 4 Jun 2020 15:16:27 +0200 (CEST) Date: Thu, 4 Jun 2020 15:16:27 +0200 From: Peter Zijlstra To: Frederic Weisbecker Cc: Ingo Molnar , LKML , Thomas Gleixner , Andrew Morton , Christoph Lameter , Chris Friesen , Marcelo Tosatti , Jim Somerville Subject: Re: [PATCH 0/2] sched/isolation: Isolate unbound kthreads Message-ID: <20200604131627.GC4117@hirez.programming.kicks-ass.net> References: <20200527142909.23372-1-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200527142909.23372-1-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 27, 2020 at 04:29:07PM +0200, Frederic Weisbecker wrote: > 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. > Thanks!