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[23.128.96.18]) by mx.google.com with ESMTP id n16si12797442jan.32.2021.09.14.07.11.55; Tue, 14 Sep 2021 07:12:09 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=Lomv8+pi; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233584AbhINOME (ORCPT + 99 others); Tue, 14 Sep 2021 10:12:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233349AbhINOMC (ORCPT ); Tue, 14 Sep 2021 10:12:02 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D0C9C061574 for ; Tue, 14 Sep 2021 07:10:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=ORJtzCbAdHLFjt3q5PVm7vWmJtjOXkitgYve8acSoVk=; b=Lomv8+pi0EJguTTHynaRBa4f5Z x9MHGfu/FXljL5t08hQWSBd9wjZHFLPI2+Y0MFswzMtXp2gVrGnGQnzgstg8JL+yN8WanMvzGSVjm kEIWLLJG2zTAYJ+zUhKDNO6SaD89qpxp7vEM1bTi76Kv9RcmGJHVUx9BY+UVQCDlSQc+j4Crs6Eyr GMyi/TpMHW7fq/G9X9d9bJ46oaoMc8nCAACaNmtN6DYjH5I25+hDaX+4UpFZf2djlMUK42kFWZ0/7 Mmh2Aqra4S2Aq+BkMxk2kz49JERNTor8FUrdTpm58I0leQSCTR5M6/z1pRtkym5wCOdnkSG3PdWW3 frThw5Yg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mQ98E-00EjcR-7u; Tue, 14 Sep 2021 14:10:05 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D9806300255; Tue, 14 Sep 2021 16:09:53 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id C260C2D069C2D; Tue, 14 Sep 2021 16:09:53 +0200 (CEST) Date: Tue, 14 Sep 2021 16:09:53 +0200 From: Peter Zijlstra To: Frederic Weisbecker Cc: LKML , Ingo Molnar Subject: Re: [PATCH v3] sched: Provide Kconfig support for default dynamic preempt mode Message-ID: References: <20210914103134.11309-1-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210914103134.11309-1-frederic@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 14, 2021 at 12:31:34PM +0200, Frederic Weisbecker wrote: > Currently the boot defined preempt behaviour (aka dynamic preempt) > selects full preemption by default when the "preempt=" boot parameter > is omitted. However distros may rather want to default to either > no preemption or voluntary preemption. > > To provide with this flexibility, make dynamic preemption a visible > Kconfig option and adapt the preemption behaviour selected by the user > to either static or dynamic preemption. > > Signed-off-by: Frederic Weisbecker Thanks!