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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 A0D2CC5CFC1 for ; Mon, 17 Aug 2026 04:03:01 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4hNfLq1yfNz2xrC; Mon, 17 Aug 2026 14:02:59 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=148.163.158.5 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1786939379; cv=none; b=RP8NPgH1pXnth05Cel3MLTstPcai8RtaaozI0eh18z5edG8t3rPV8dmlv2DWpRgdUDjBGfuurGx0xiGt3Ahs+eMq0qi1WRU8ih7TaAM5CXET7ZtSfFkWtAhK0yiFHQSt+E0IlwjIgqtF0HND3HDORU+zvBWDUMRIEGts9rbmP4Uw6Qt9WmI9A4RrhfTP+BhOOpmLoA0y7N09OfdeUdNM9V/n3If7f5TB55Zxc/AXEWT0x9YMkcagk+x/KOPqRJhkTEMmcVK/mnEmz6rc1Dgj8GIapIB8xNY4kTPIafOeLKtj55CqbPtZLF83n1qXZPGNl61yjAMxOfXC/Tr//Vp5hA== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1786939379; c=relaxed/relaxed; bh=m7rjdXvxmQVC11hGSLVWeG7Ao0hxbGsMr2H+5qF0uQA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Xs0P9H1OWOz7eiSrCH1l1GxT8CGXYzJ22TnIp7r3ymHV8jiclNaD3DuX8vtYic3xKP/kpfe5HEgw27999Mdh/bxXGQrbWBq3Zq7fjwvn1gUYIQyrmkY9VZ+nJCM5EHfL4a9YbsDc2QYO0dq8kYM6ZFp6jk31KuIS8MDvKjxkJTlYx4H1mwv/lMKDO8LdlZWrIbrK/Q9iZDd8tFTwCTQm07IxMT4cJEBzjorrfh/IJH43YJOiIbIi8jaRspyPfd8fSSe3aXeEL7KK4wpx/KHWqknbymytFbMbPPOZjYRhZH1qIzm4YlAdsMQYm4SnYnD25MWbQydFkLMq0GV00uiNwA== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=JphkqLm8; dkim-atps=neutral; spf=pass (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=maddy@linux.ibm.com; receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=JphkqLm8; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=maddy@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4hNfLp1hlWz2xl6 for ; Mon, 17 Aug 2026 14:02:57 +1000 (AEST) Received: from pps.filterd (m0356516.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 67GLVtGj3636306; Mon, 17 Aug 2026 04:02:55 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=m7rjdX vxmQVC11hGSLVWeG7Ao0hxbGsMr2H+5qF0uQA=; b=JphkqLm8kIRAkbhLkVJxnI q/AYOS1AKsmUtvA8demXZlGXCsiNiH6eKVGf426K9EBt4Yjfmc4WrbcRQWIHuzvh dUgR26gSGuGTvf4nXunsO1ChqdEYTR0oTOwfI7fYVYVcP/1MkD/dqtZOyV0kMEOt ofH+tPhie/Vdahik/0E0Y6G0Vogx+7g1icIBKRKUYWjYz3148XbHPPxzAVq5BzHX BvmQoivqtSGejJFhDAYnb140JE4uLn+3/+zB/ZQdPRNXf1iBZEtRBmroczr8vtUY WTgTJl2/HwqMEZlh8Q54AxmoWTh31I862agguKWYWIn0LbalA+S+M64jKFkbdeBA == Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4g2dhkr61c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Aug 2026 04:02:54 +0000 (GMT) Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 67H3uaoq018398; Mon, 17 Aug 2026 04:02:54 GMT Received: from smtprelay04.dal12v.mail.ibm.com ([172.16.1.6]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 4g34ng40td-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Aug 2026 04:02:54 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (smtpav06.dal12v.mail.ibm.com [10.241.53.105]) by smtprelay04.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 67H42rnX17629780 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 17 Aug 2026 04:02:53 GMT Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9BF9058059; Mon, 17 Aug 2026 04:02:53 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7C2B058043; Mon, 17 Aug 2026 04:02:52 +0000 (GMT) Received: from [9.123.14.9] (unknown [9.123.14.9]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 17 Aug 2026 04:02:52 +0000 (GMT) Message-ID: <931bb729-a991-49a8-ba42-5bf45eea21ec@linux.ibm.com> Date: Mon, 17 Aug 2026 09:32:51 +0530 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [BUG] Continuously increasing spurious interrupts inside pSeries guest on PowerNV host To: Timothy Pearson , linuxppc-dev Cc: Ritesh Harjani References: <582904882.11159.1786719390349.JavaMail.zimbra@raptorengineeringinc.com> Content-Language: en-US From: Madhavan Srinivasan In-Reply-To: <582904882.11159.1786719390349.JavaMail.zimbra@raptorengineeringinc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE3MDAyOCBTYWx0ZWRfX9kbMi7QaO6iE HE1EPFCamX9r997V6dvVyi0gBWffCsDs8Ujcbkd0icWwVJEJJHj69NMeHcKrFC3Q9f+0jEZk4EZ iLbuuTBTnduAzUXbwh7caB59SAJyfHSH7mx3N7zO1DYUBcjNlv2kMPyOAIFxn2pum7zto/Vr4R4 OXL8bpiEAtAlMI6Mj0FwsiRTBGWlQNrdt95kNdgBz1prADI4IzXRrwkH/Nm6LFor1M2b+8LHZ6w Ee7zGl/tPV3I344Muu/PiiARJlFj4yZWmSZitJjHi22W0ZH22pQMKVbjiHiCbkuqy8bvKxves/U rApDxUCsA0xClLmXaQ75OPBGKxIBsmcUu/OZRB/jCUqj7KUZ6SbvQ5S4P7ojRSkl1WQLJTzL67z i8C5k2y2lppX53VTlCDqVXFWZzEfeRfVmeJou3Vdl1OQnmkyIrjhNqpuHE9httdDuTukCzJQrDw QfBr4OWVHh41XwR9a3Q== X-Proofpoint-Spam-Info: AW1haW4tMjYwODE3MDAyOCBTYWx0ZWRfX5TGyHwyo1tJS SKOx3bHGdFe7TVXRX2wkG7/pF8RMeotYnz89GHIF588v4GuLIcO27i4FADcrkr6s4edgkqbiIMr 89xP9DsjQHIL5loJt063BHNPtZMZLYM= X-Authority-Analysis: v=2.4 cv=JKkLdcKb c=1 sm=1 tr=0 ts=6a8287ef cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=nJLlUGOcei1BVvQT3c8A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: _olPxzV9vWDBQtSJ3cKBssHNf8kLFAOw X-Proofpoint-GUID: I8QSrJ0aQJKY5yGDTBEeTyfdN8oiSVRW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-16_06,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1011 adultscore=0 impostorscore=0 spamscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608170028 On 8/14/26 8:26 PM, Timothy Pearson wrote: > With kernel 6.12 (Debian stable) we see a continuously increasing spurious interrupt count inside a pSeries guest running on a PowerNV host: > > cat /proc/interrupts > CPU0 > 16: 0 XIVE-IPI 0 Edge IPI-0 > 17: 0 XIVE-IRQ 4096 Edge RAS_EPOW > 21: 2 XIVE-IRQ 4353 Edge hvc_console > 23: 0 XIVE-IRQ 4097 Edge RAS_HOTPLUG > 24: 0 pSeries-PCI-MSI 0 Edge virtio0-config > 25: 50995 pSeries-PCI-MSI 1 Edge virtio0-input.0 > 26: 45569 pSeries-PCI-MSI 2 Edge virtio0-output.0 > 27: 0 pSeries-PCI-MSI 16384 Edge virtio1-config > 28: 6 pSeries-PCI-MSI 16385 Edge virtio1-input > LOC: 5781 Local timer interrupts for timer event device > BCT: 0 Broadcast timer interrupts for timer event device > LOC: 2 Local timer interrupts for others > SPU: 449927 Spurious interrupts > PMI: 0 Performance monitoring interrupts > MCE: 0 Machine check exceptions > NMI: 0 System Reset interrupts > WDG: 0 Watchdog soft-NMI interrupts > DBL: 0 Doorbell interrupts > > The spurious interrupts are apparently from the virtio0-[input|output] devices. Thanks for the report Timothy, we will have a look at it. Maddy