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Wed, 19 Aug 2026 17:43:57 +0000 (GMT) Received: from [9.61.252.205] (unknown [9.61.252.205]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 19 Aug 2026 17:43:56 +0000 (GMT) Message-ID: Date: Wed, 19 Aug 2026 23:13:55 +0530 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] KVM: PPC: Book3S HV nestedv2: Don't drop pending doorbell across L2 entry To: Vaibhav Jain , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Anushree Mathur , Amit Machhiwal References: <20260803034426.44249-1-vaibhav@linux.ibm.com> <20260819163954.3b08c1c2-55-amachhiw@linux.ibm.com> Content-Language: en-US From: Anushree Mathur In-Reply-To: <20260819163954.3b08c1c2-55-amachhiw@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=MthiLWae c=1 sm=1 tr=0 ts=6a85eb62 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=fQgsUzIeWd7idk2l9RwA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: 0IThoGAvELkdveJillOlbcIY8bgEeete X-Proofpoint-GUID: 0IThoGAvELkdveJillOlbcIY8bgEeete X-Proofpoint-Spam-Info: AW1haW4tMjYwODE5MDEzNiBTYWx0ZWRfX9ghAPxb0O83c gvAhcd3e00vMDexNrGx7DlkEXZz59pphLZePYZXYLk8mHEiPRjZnD2W3n0wM537n9I0cLrAv9iN aY9fBzjqD0ag8rtzDBfRWBqa4O9DNOw= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE5MDEzNiBTYWx0ZWRfX72shs0DH3V/9 G0132SfIFZxn7ZTI58MgU9+R6miT+3pe4sOclJ4E5Y/FNxR71TUhkU6P13mUn+N8lDuE/h7k5OT 06h/hC0hEPTi9GfG0/WwA6TIb5XTK8V+yAKhPKXj0K00tZ+0tjwlo1jr9o4UduilUbQgy2ZhVQe gwlBa6nvKHM0CuW3BlCXmR+mkopdbyubsitxzjsiuKfPs3KnfXoOk/A68nVjXLSjggptM1a1zFz 99obgoJg6jJMKj6D+fwfX8EDYr39jjEO9toLS6pnnU1W7yMUe8xK4Rl3WpzOhh3YyZQz09Id8hG nV+Ny997pZXPWTlsgA7U/zQqex/81KNPMWE0LCC5FJhEMpwTSCCKV0qc/fE2kzvU3RpF+96V1m/ I3UCRV2YhPLCLQBBwH95W/DY8P5LSlm792aMKwKYjbuuTA4ZiqsGClJCauq2yYgBD4tqe1OeadJ ckDLoKsyooegpb2XHMA== 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=2026-08-19_04,2026-08-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 bulkscore=0 phishscore=0 clxscore=1015 spamscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608190136 On 19/08/26 4:42 PM, Amit Machhiwal wrote: > On 2026/08/19 04:32 PM, Anushree Mathur wrote: >> > <...snip...> > >> b) Even after applying the patch also it is giving same softlockup issue as >> mentioned above: > Hi Anushree, > > There was a v2 of this patch sent here: > > https://lore.kernel.org/all/20260812034628.1122115-1-vaibhav@linux.ibm.com/ > > Did you get a chance to test it? Could you verify if the issue persists > with the v2 as well? > > Thanks, > Amit > >> Though I have enough vcpus and memory on the guest (16 vcpus , 13Gi of >> memory)  and ample amount of memory and cpus >> present on host still these softlockups are happening after applying the >> patch too. I tried reducing stress also on the guest >> but still this issue is seen. >> >> stress-ng --cpu 4 --vm 2 --vm-bytes 1G --hdd 2 --hdd-bytes 1G --sched other >> --timeout 3600000s >> >> If you are planning to send next version of this patch, >> Please do add my reported-by: >> Reported-by: Anushree Mathur >> Hi Amit, Yes I have tested this patch too and I am still seeing the issue. Let me reply back for this v2 patch also. Thank you, Anushree Mathur