Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D4A0C433EF for ; Tue, 23 Nov 2021 17:28:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239212AbhKWRba (ORCPT ); Tue, 23 Nov 2021 12:31:30 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:60764 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230359AbhKWRb1 (ORCPT ); Tue, 23 Nov 2021 12:31:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1637688498; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=rbwewLFsABuwwFA7Yf68+QvHaRv0OksbhJ5ANLDADx0=; b=Wpks/hwTHm/CoCcSAyoGaQFE3rccuYo5uG8vJyyGYvPj1g59OMvNO6TksOWS0Cj70D86OK hOUIynMutej5wBKigOa4pSbeOBYYyjfO/GaXSf/N8xCEkzlLgBCPhBnX1U/rLLUUGhD7Ki k3IBfwRvtRCXqJEJY4yYbgod0b8fc54= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-8-nswE7KRkN3Czf507jAtJ5w-1; Tue, 23 Nov 2021 12:28:17 -0500 X-MC-Unique: nswE7KRkN3Czf507jAtJ5w-1 Received: by mail-wm1-f72.google.com with SMTP id a64-20020a1c7f43000000b003335e5dc26bso3200843wmd.8 for ; Tue, 23 Nov 2021 09:28:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=rbwewLFsABuwwFA7Yf68+QvHaRv0OksbhJ5ANLDADx0=; b=Ergw4tY31y8JnprcNGz7PmPH4RrXXWMSpzDv+5Zikw+55u+7HU3KZ8qCn9nyKTwoz8 W4bjPHxppE9B17oUmDzSCSDpr+5MZjSOP1xTcduaqZKVEGQIwLtojHtqXacbr6BFwKUh KERDmz3tEVHJ31Wxugf4xubqCJ1ndzHiCzMbw0uwNCvbMA+JPZlqlYirS1cyJ07SQjVf KyL4G0cmF90y8KVLaLzEIcFHcEC0b6HH0bNGb238JonjvHhvfpnJqRiiMZl7mN2sHb2/ 18MIrfYk/PJJzerNJdKhQshO51TrfQQCazLRRNuuNiRd+xLb2ZGMPLteCLiTKpE7SfhC Z/5w== X-Gm-Message-State: AOAM5331GEMSGFv9s7xEASVkMO24pg61vLtJjc5NvfsoOrG4mi51Eo7i YO/iXhCz9vqOq+7XQ/FWp8WFShxr31wj0C4WdLVZu3/NBQ8IwP0biVaEUs1ihCQC3hycuGlOrnz CLN1HJjjim7gjadBA6qJiPv1X X-Received: by 2002:a05:600c:4e94:: with SMTP id f20mr4980351wmq.77.1637688496426; Tue, 23 Nov 2021 09:28:16 -0800 (PST) X-Google-Smtp-Source: ABdhPJzkGcSDFJfJ/eExQMmeWAJzI8oQYUpvN8NFnVUgfIHLPXSuqBAOg/ZJ3gCDo+Vofun2YxFzkA== X-Received: by 2002:a05:600c:4e94:: with SMTP id f20mr4980310wmq.77.1637688496191; Tue, 23 Nov 2021 09:28:16 -0800 (PST) Received: from localhost.localdomain ([2a00:23c6:4a17:4f01:3a16:ae0:112c:ba92]) by smtp.gmail.com with ESMTPSA id p62sm1827353wmp.10.2021.11.23.09.28.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Nov 2021 09:28:15 -0800 (PST) Date: Tue, 23 Nov 2021 17:28:14 +0000 From: Juri Lelli To: Frederic Weisbecker Cc: "Paul E . McKenney" , LKML , Uladzislau Rezki , Neeraj Upadhyay , Boqun Feng , Josh Triplett , Joel Fernandes , rcu@vger.kernel.org Subject: Re: [PATCH 4/6] rcu/nocb: Create kthreads on all CPUs if "rcu_nocb=" or "nohz_full=" are passed Message-ID: <20211123172814.4rev7z45onxvjmy4@localhost.localdomain> References: <20211123003708.468409-1-frederic@kernel.org> <20211123003708.468409-5-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211123003708.468409-5-frederic@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 23/11/21 01:37, Frederic Weisbecker wrote: > In order to be able to (de-)offload any CPU using cpuset in the future, > create a NOCB kthread for all possible CPUs. For now this is done only > as long as the "rcu_nocb=" or "nohz_full=" kernel parameters are passed Super nitpick! In subject and above sentence, "rcu_nocb=" is actually "rcu_nocbs=", isn't it? Feel free to ignore the noise, of course. :) Best, Juri