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[2620:137:e000::1:20]) by mx.google.com with ESMTP id c3-20020a170903234300b0015d02c4c78esi4774338plh.487.2022.05.10.12.26.54; Tue, 10 May 2022 12:27:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=SgRYJI5+; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345368AbiEJPBu (ORCPT + 99 others); Tue, 10 May 2022 11:01:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345495AbiEJPBN (ORCPT ); Tue, 10 May 2022 11:01:13 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3097A2BE532; Tue, 10 May 2022 07:24:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id F170A6178F; Tue, 10 May 2022 14:24:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D559C385A6; Tue, 10 May 2022 14:24:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652192657; bh=Pc46AuG13t873MQN9JMMXmwCqYFzgX3gktX+Clx2xJ0=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=SgRYJI5+Fy88ZZRFej4EMh0HZBYJwKDdgfnTD7JllCWtmfJG++8Qg6D1kkBXms5Dr HCzm1pcepruOinNgMjLnEkqvH03MHvjRYds9S63IhpB6BopivPO9A9ZCu+j0h4DidW pMohA3xAwQTj9WL+tuvKJp6uaASmRDEF+vOfJ1yla+KV68bzlcbz5LYfLtHrh+b7u+ vE35wr2N1sSiYYi3wWerICw5+fmA52qHEJ7YQhSvv2aoqaHbZxclXpLgPd83JytVqf DkHBTNBCPiu1qdWhark0xD/yvhCQFh/gXKmQI0ejvkE4bHb2H1MRvSwIjw40Elrpst i0WCtlJdzdoJQ== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id E425A5C0602; Tue, 10 May 2022 07:24:16 -0700 (PDT) Date: Tue, 10 May 2022 07:24:16 -0700 From: "Paul E. McKenney" To: Steven Rostedt Cc: Uladzislau Rezki , Joel Fernandes , Alison Chaiken , Sebastian Andrzej Siewior , LKML , RCU , Frederic Weisbecker , Neeraj Upadhyay , Oleksiy Avramchenko Subject: Re: [PATCH] rcu/nocb: Add an option to ON/OFF an offloading from RT context Message-ID: <20220510142416.GR1790663@paulmck-ThinkPad-P17-Gen-1> Reply-To: paulmck@kernel.org References: <20220507223247.GK1790663@paulmck-ThinkPad-P17-Gen-1> <20220508213222.GL1790663@paulmck-ThinkPad-P17-Gen-1> <20220509033740.GM1790663@paulmck-ThinkPad-P17-Gen-1> <20220509181417.GO1790663@paulmck-ThinkPad-P17-Gen-1> <20220509183934.GQ1790663@paulmck-ThinkPad-P17-Gen-1> <20220510100946.5fdff700@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220510100946.5fdff700@gandalf.local.home> X-Spam-Status: No, score=-7.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 10, 2022 at 10:09:46AM -0400, Steven Rostedt wrote: > On Mon, 9 May 2022 11:39:34 -0700 > "Paul E. McKenney" wrote: > > > This allows your current RCU_NOCB_CPU_CB_BOOST with something like > > this in place of the "default n": > > > > default y if PREEMPT_RT > > default n if !PREEMPT_RT > > BTW, I don't think you need the !PREEMPT_RT, because all configs are > 'n' by default. That is: > > default y if PREEMPT_RT > > should be good enough. Good point, thank you! That said, there is a lot of "default n" in a lot of Kconfig files. And I am OK making this explicit. So Uladzislau's choice. ;-) Thanx, Paul