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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 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 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 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