From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12A0B31986C; Tue, 9 Jun 2026 14:11:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781014302; cv=none; b=IWI/rYtkuq5AxvjiOejrs8nA0bE5fMapxyTzMxsMbMUsV5wLq3fTs4V0oa0Dl/65s06iDrzhDal1k3WnmohQpzHtngrfdBhUELI3w77ggXA4Rkbtdi8uYoUDiGgwQm45FSkIgUTtlIiPWFALnOAyHpx47prNyqdvzThvVS/9C7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781014302; c=relaxed/simple; bh=8h5yT93e2dlD2MIOvzgVKpndjqsGDKzs+AolZYJc+VQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hd/2jem7FDFfy8fTFTeGjnFzmZQTVPrwSZ3vzgcQSfMRyoScH7yxWpVb6fltHMJKZRiSZWzfJIuxweTJAOKOYXpGODs0XTqM2UGSxahOHkuntFKXn9bpAx/RFnORIkkxs3qbDWOBcOpPgTVtrQEyJWu3Rji2MsVr9ZzqHllevhQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=QH5j3hf1; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="QH5j3hf1" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6598B2ol1266651; Tue, 9 Jun 2026 14:11:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=pp1; bh=F9riTq8/qJjTUby5Le27Usq6dpwIUG 01u9LcRHaLfPQ=; b=QH5j3hf1utjBMfHoFbfYBOD19VqyhSVNRiuGoa75KbIcRB GiptnOQpx2QjAbZLuYlaB+SfeNk52yJ2b329QIhiiqbHwRjeN96iTymLXWlceLoK dSGve8saKLOaWag+EpCN5lqJtW/jm2MH28dtYD+koHAzAWEkNBIN6KnCuo17TUkr Mx9z3+3sAMOktibAYaahJ7YyCvdosS77gw9wZRC1Xr0LWqqaR1RmIOo4ImEkscS0 uFe/91sXqwK3kY77n6s5YaoJti5401I13QU097QZ7siamFetmwpypNw4I/cKBsYG Nn33y16XUhlSX+a9aUxX42ymFk44Lg8uKoffoKqw== Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4em9ye4cfe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Jun 2026 14:11:33 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 659E4oAN032222; Tue, 9 Jun 2026 14:11:32 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4emx8w2e0k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Jun 2026 14:11:32 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (smtpav03.fra02v.mail.ibm.com [10.20.54.102]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 659EBTbr43057602 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Jun 2026 14:11:29 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA80F20043; Tue, 9 Jun 2026 14:11:28 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2C62D20040; Tue, 9 Jun 2026 14:11:28 +0000 (GMT) Received: from osiris (unknown [9.111.52.116]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 9 Jun 2026 14:11:28 +0000 (GMT) Date: Tue, 9 Jun 2026 16:11:26 +0200 From: Heiko Carstens To: Mete Durlu Cc: Vasily Gorbik , Alexander Gordeev , Sven Schnelle , Anna-Maria Behnsen , Frederic Weisbecker , Ingo Molnar , Thomas Gleixner , "Rafael J. Wysocki" , Daniel Lezcano , Christian Loehle , Christian Borntraeger , Ilya Leoshkevich , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: Re: [PATCH v2 0/5] s390/idle: CPU idle driver Message-ID: <20260609141126.9217Gf8-hca@linux.ibm.com> References: <20260609-idledriver-v2-0-21c2f581d11f@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260609-idledriver-v2-0-21c2f581d11f@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA5MDEzNCBTYWx0ZWRfX7cOHGb4yYmQU UWBzo6rm/eMBefjPYW/OZYlCV3uku6HiU0m3iCkf5bNfBUMwT0/rU5EYO2WuAJmAeHy3MqqIkTN 4wkhRxnvn+QinS7ROEZd4dcSXXwop0F+mkVw5E08aGwTC3tWcTVvv3YwD1IJIZ2ag+zTzz9JRyA cqUZHusl0iPNq9HbOThxK2bJPOVrRjpsEy5Gmxs70GK2skZtVAPE8vcXlq+VjLkERM43ar59eyf zw9cwA8/Pv21jYnHW3ZA4oWIfsF23ljgiXxa43R9Lgtj3Mr8e+RXrN8LvUoINfOpMKCdwr8T0NB r7NWSXbr85VwXd3r0oOlVHAYhIN1nNlX/8ACgiACBiGQHTAqpnVJ8KsYydOOZZargb3D1/DbCye v6GSc/HeXPlisChYGsfKpfj8wWLA4A+/9Rqshf52QctirfoudDtSGoDThuivMojnaJCAcX0FfD5 ET3TcfIc18IkWn5duPg== X-Authority-Analysis: v=2.4 cv=QKhYgALL c=1 sm=1 tr=0 ts=6a281f15 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=kj9zAlcOel0A:10 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=7TjuNBi8Wp6cLl_tVUMA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: N8el8hY51p8ujlNCOLrQiRgqMUm5Rzox X-Proofpoint-ORIG-GUID: N8el8hY51p8ujlNCOLrQiRgqMUm5Rzox X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-09_03,2026-06-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 adultscore=0 phishscore=0 malwarescore=0 impostorscore=0 suspectscore=0 spamscore=0 clxscore=1011 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606090134 On Tue, Jun 09, 2026 at 03:24:20PM +0200, Mete Durlu wrote: > v1 -> v2: > > * Add idle driver enteries to MAINTAINERS file (Christian Loehle) > * Remove extra line break left in drivers/cpuidle/Kconfig.s390 > (Christian Loehle) > > This patch series introduces a CPU idle driver for s390 > architecture that leverages the existing cpu idle infrastructure and > TEO (Timer Events Oriented) governor to optimize idle state selection > based on timer events and interrupt patterns. ... > Mete Durlu (5): > s390/tick: Remove CIF_NOHZ_DELAY flag > tick: Remove arch_needs_cpu > s390: Enable TIF_POLLING_NRFLAG > s390/idle: Introduce cpuidle for s390 > s390/configs: Enable cpuidle driver on s390 > > MAINTAINERS | 8 +++ > arch/s390/Kconfig | 5 ++ > arch/s390/configs/debug_defconfig | 2 + > arch/s390/configs/defconfig | 2 + > arch/s390/include/asm/processor.h | 4 -- > arch/s390/include/asm/thread_info.h | 1 + > arch/s390/kernel/idle.c | 1 - > arch/s390/kernel/irq.c | 4 -- > arch/s390/kernel/smp.c | 1 - > drivers/cpuidle/Kconfig | 5 ++ > drivers/cpuidle/Kconfig.s390 | 11 ++++ > drivers/cpuidle/Makefile | 4 ++ > drivers/cpuidle/cpuidle-s390.c | 104 ++++++++++++++++++++++++++++++++++++ > include/linux/tick.h | 3 -- > kernel/time/tick-sched.c | 7 ++- > 15 files changed, 145 insertions(+), 17 deletions(-) Looks all good to me. Reviewed-by: Heiko Carstens