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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7381EC54E94 for ; Wed, 25 Jan 2023 11:21:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235429AbjAYLVZ (ORCPT ); Wed, 25 Jan 2023 06:21:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235742AbjAYLUl (ORCPT ); Wed, 25 Jan 2023 06:20:41 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B387626A7; Wed, 25 Jan 2023 03:20:02 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 484FA4B3; Wed, 25 Jan 2023 03:20:44 -0800 (PST) Received: from bogus (unknown [10.57.77.84]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3F4883F71E; Wed, 25 Jan 2023 03:20:00 -0800 (PST) Date: Wed, 25 Jan 2023 11:19:57 +0000 From: Sudeep Holla To: Ulf Hansson Cc: Krzysztof Kozlowski , Sudeep Holla , "Rafael J. Wysocki" , Daniel Lezcano , Lorenzo Pieralisi , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sebastian Andrzej Siewior , Adrien Thierry , Brian Masney , linux-rt-users@vger.kernel.org Subject: Re: [PATCH v3] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT Message-ID: <20230125111957.uzf2hli5md2pm43n@bogus> References: <20230119184228.683892-1-krzysztof.kozlowski@linaro.org> <20230124153411.nwkbjgoqgkua2icm@bogus> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 25, 2023 at 11:08:04AM +0100, Ulf Hansson wrote: > On Wed, 25 Jan 2023 at 08:43, Krzysztof Kozlowski > wrote: > > > > On 24/01/2023 16:34, Sudeep Holla wrote: [...] > > > Any particular reason for even compiling this file in or allowing the > > > ARM_PSCI_CPUIDLE when PREEMPT_RT=y ? If we can't enter idle states, we > > > can as well compile this file out ? > > > > It's the power domain sued for other devices, so we need it. Otherwise > > other devices will keep waiting for this missing power domain provider. > > Yes. > > And we are still able to use those idle states that are solely per > CPU, which is probably nice to have. No? > Makes sense, thanks for the explanation. Also the other discussions clears probably questions I had. -- Regards, Sudeep 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 79D93C54E94 for ; Wed, 25 Jan 2023 11:21:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=w8lR0dosqzImnOGH6kEQQ7IqtwM5QAvdgzOTFO1AKro=; b=RsvOOJ3fP47F2R E+k9BnKJN1kPWfYJZoCbNBSjolvrTOz8BSv6GQgDgNBdJ67X7YzgpDBUh989fLgyMpvmt1ddicEwF ODfDRH7BNbn/VAe9WlkgTUe4bo0vAnwFOdubWS01T+PE+FPi6jl8a465jGmFBDeHNphxWnfHilh/P ppNiOlZC7QYygschOfSQ1lte1+GSHWemTHwTC6p7OQaK8+L7nnax2Vu4AaqCkdpkNXwBohkCAs9jl zevDrOPpamJ6/U9TGUIdTpm82yaOXjkyEsvABCyS/+80D5/wXXFtG1Jxry2wst6AMTccC1OGmJC8o rIKIj1h+0gu1QsNbT/1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pKdp4-0078J3-EJ; Wed, 25 Jan 2023 11:20:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pKdp1-0078I1-CO for linux-arm-kernel@lists.infradead.org; Wed, 25 Jan 2023 11:20:08 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 484FA4B3; Wed, 25 Jan 2023 03:20:44 -0800 (PST) Received: from bogus (unknown [10.57.77.84]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3F4883F71E; Wed, 25 Jan 2023 03:20:00 -0800 (PST) Date: Wed, 25 Jan 2023 11:19:57 +0000 From: Sudeep Holla To: Ulf Hansson Cc: Krzysztof Kozlowski , Sudeep Holla , "Rafael J. Wysocki" , Daniel Lezcano , Lorenzo Pieralisi , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sebastian Andrzej Siewior , Adrien Thierry , Brian Masney , linux-rt-users@vger.kernel.org Subject: Re: [PATCH v3] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT Message-ID: <20230125111957.uzf2hli5md2pm43n@bogus> References: <20230119184228.683892-1-krzysztof.kozlowski@linaro.org> <20230124153411.nwkbjgoqgkua2icm@bogus> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230125_032007_504150_28EC1D9F X-CRM114-Status: GOOD ( 14.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jan 25, 2023 at 11:08:04AM +0100, Ulf Hansson wrote: > On Wed, 25 Jan 2023 at 08:43, Krzysztof Kozlowski > wrote: > > > > On 24/01/2023 16:34, Sudeep Holla wrote: [...] > > > Any particular reason for even compiling this file in or allowing the > > > ARM_PSCI_CPUIDLE when PREEMPT_RT=y ? If we can't enter idle states, we > > > can as well compile this file out ? > > > > It's the power domain sued for other devices, so we need it. Otherwise > > other devices will keep waiting for this missing power domain provider. > > Yes. > > And we are still able to use those idle states that are solely per > CPU, which is probably nice to have. No? > Makes sense, thanks for the explanation. Also the other discussions clears probably questions I had. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel