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 57267CCA476 for ; Mon, 13 Oct 2025 10:29:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AfGQqri2a4po2taSAV4I25Z2mcB3VfBkrdk7Z/AhhSk=; b=ufDU6Iz7WPOPl9Yu/uQgCwAdcZ BtxY/lJCwu5REBSYAjFcMqgyjFqnw7paJb9a1Us9+dSmm16Fomz2s2CeyRNArTP/aqDjCfs1+g5aX UtgXaxClGkHj0IDnwSHE04bf315/JT+jhGnKs+wXnAWsOb1+qbWKD/OmpW8Fx7T0k2FDOXvyLmwe0 nYMdVGKim4g5CtUVDsGLZ4TEP1bYqSGpcCAADFj96A3IoJ/6J/P2Vn4DptRS1xqLLPPkXSnAhmcxe aFmkJE1VuD27yg+dVzBDIzaek1w9CNdP4tBqw2t1b/yOVAvmslWbHMdNeKcrDZ8V3SbTFIQ7whzS0 WW/j8jmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v8Fo1-0000000CuON-2U59; Mon, 13 Oct 2025 10:29:29 +0000 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v8Fny-0000000CuO2-1w5w for linux-nvme@lists.infradead.org; Mon, 13 Oct 2025 10:29:27 +0000 Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 59CLF802007315; Mon, 13 Oct 2025 10:28:52 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=AfGQqr i2a4po2taSAV4I25Z2mcB3VfBkrdk7Z/AhhSk=; b=VHX/SoW5Oe/QlrzyHsrloP 7manNDBlGJaEu5HMps1vkzo2qL+q9RpV7WggDyysYQuC9skf00wzarrfwHbIuyOO YEHDDzyhNrq3JLJhH2hXpcbeKLatICaE+bGAUhrV5gy1hiurK/jTcZ38ipdCNz1O 9x1wdLBjr8NHnM+pJuicySCkrGO/5yyE67eCzJd0Vlce5m/dKNZqnMDPL4W3ori5 wUHK0tA5WW09PxJE7RLITwCSOsPrS0uJ38QNRJe3xgmczWxC3ELd/6np6JfJnKvS DmVf9A2XHw2I7ZhKkL2AVlBA4apN2OdYvtWs3mavDDbxcQ+45YBRLYOqhpuCvs9A == Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 49qevyr5bg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Oct 2025 10:28:52 +0000 (GMT) Received: from m0360072.ppops.net (m0360072.ppops.net [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.0.8) with ESMTP id 59DA60D4013691; Mon, 13 Oct 2025 10:28:51 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 49qevyr5bd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Oct 2025 10:28:51 +0000 (GMT) Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 59DA0P3o018917; Mon, 13 Oct 2025 10:28:51 GMT Received: from smtprelay01.wdc07v.mail.ibm.com ([172.16.1.68]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 49r2jmdc0t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Oct 2025 10:28:51 +0000 Received: from smtpav02.dal12v.mail.ibm.com (smtpav02.dal12v.mail.ibm.com [10.241.53.101]) by smtprelay01.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 59DASnrJ32702850 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 13 Oct 2025 10:28:49 GMT Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E92B58051; Mon, 13 Oct 2025 10:28:49 +0000 (GMT) Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3578D5805A; Mon, 13 Oct 2025 10:28:45 +0000 (GMT) Received: from [9.67.162.81] (unknown [9.67.162.81]) by smtpav02.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 13 Oct 2025 10:28:44 +0000 (GMT) Message-ID: <01f7b9fc-7398-4a28-ae78-e7b4e1c6ca0f@linux.ibm.com> Date: Mon, 13 Oct 2025 15:58:43 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bug report][PPC]: rmod nvme driver causes the kernel panic To: Nam Cao Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, tglx@linutronix.de, maz@kernel.org, gautam@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, Linux List Kernel Mailing , "linux-nvme@lists.infradead.org" References: <31838b50-e420-405a-af23-6c6ede281386@linux.ibm.com> <87h5w3f7ed.fsf@yellow.woof> Content-Language: en-US From: Nilay Shroff In-Reply-To: <87h5w3f7ed.fsf@yellow.woof> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: F6cV-UV_QR2MuYqfLZ0aM5S912tkmXFH X-Authority-Analysis: v=2.4 cv=eJkeTXp1 c=1 sm=1 tr=0 ts=68ecd464 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=sZNwUNTCad_J9JpMvOQA:9 a=QEXdDO2ut3YA:10 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDExMDAxNCBTYWx0ZWRfX05TKRTHb9HTu hmVuK8FlFyk7VAPXkhK9ShubIQNF5kxSWY0CS/AYeTDcfEfW1v6V9fEP2PfgS2X/08G3ob3b6bW GnOu3zD54kX+Ox9Uz/8yyJvIf4uVW7psModd9MN/HtvCLctcLuFyVVVEf9lA8+4vjYO0flYmSIh RbswUasaH4hmZUVFCVh4FUqNWWrp7sCoVAXuKC1c4WvZYg2hVLXvlHecojICB1CVDDrgLW85/kO ICiMWemujeYELxXJhpKfjsi1dnhZhNcL52j4ge7NPu/Ps6d/5HP/1ahEbTlgOXm96QQ80YDPQ7J zFfW2UqzslhoICFGhJkbDMk5Qw4OJD92NY6fwkToD+CHOxvHWQpzwX0HG+YOLVk94byd7eYNJVx UL3hxMwAmb1vgBwIcaikln1GFRwNlA== X-Proofpoint-GUID: zLNgnSe9ULUTe0yqUThnKXdsaGy71AZi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-13_04,2025-10-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 impostorscore=0 phishscore=0 malwarescore=0 adultscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510110014 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251013_032926_792286_CE2BDCC8 X-CRM114-Status: GOOD ( 13.32 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 10/13/25 3:30 PM, Nam Cao wrote: > Nilay Shroff writes: >> Hi Nam, > Hi Nilay, > >> On the latest upstream mainline kernel, I am encountering a kernel >> crash when attempting to unload the NVMe driver module (rmmod nvme) >> on a POWER9 system. The crash appears to be triggered by the recent >> work on using MSI parent domains, discussed here: >> https://lore.kernel.org/all/cover.1754903590.git.namcao@linutronix.de/ > > Thanks for the detailed analysis. This should be fixed by: > https://lore.kernel.org/linuxppc-dev/20251010120307.3281720-1-namcao@linutronix.de/T/#u > > which currently is in powerpc/fixes-test Thanks for the fix! This works well... --Nilay