Kernel KVM-PPC virtualization development
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From: Christian Zigotzky <chzigotzky@xenosoft.de>
To: "Shrikanth Hegde" <sshegde@linux.ibm.com>,
	"Michal Suchánek" <msuchanek@suse.de>
Cc: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	harshpb@linux.ibm.com, Gautam Menghani <gautam@linux.ibm.com>,
	amachhiw@linux.ibm.com,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
	Madhavan Srinivasan <maddy@linux.ibm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	"R.T.Dickinson" <rtd2@xtra.co.nz>,
	hypexed@yahoo.com.au, mad skateman <madskateman@gmail.com>,
	Christian Zigotzky <info@xenosoft.de>,
	Samir M <samir@linux.ibm.com>,
	Venkat Rao Bagalkote <venkat88@linux.ibm.com>,
	Narayana Murty N <nnmlinux@linux.ibm.com>,
	Hari Bathini <hbathini@linux.ibm.com>
Subject: Re: [Linux PPC] Disable PREEMPT
Date: Fri, 18 Sep 2026 04:39:57 +0200	[thread overview]
Message-ID: <7e06fb84-ca2e-dbb4-47bd-e95ee11113c9@xenosoft.de> (raw)
In-Reply-To: <7ad57b61-4567-42c8-a9f6-faaabe7766a7@linux.ibm.com>

On 17/09/26 16:15, Shrikanth Hegde wrote:
>
> Hi Michal,
>
>>>
>>> Give it a try.
>>>
>>> I am suspecting both lockup, stack corruptions are secondary 
>>> symptoms here.
>>> While recreate, I have different type of traces.
>>
>> Yes, it does work for the crash I see.
>
> Thanks. Give me sometime to see further on that. Didn't get any time 
> today.
>
>> However, we hijacked the report
>> of KVM locking up on FSL Cyrus+, and that is likely a different problem
>> still not addressed.
>>
>
> Ah, that's what you meant. Yes, i still don't know where FSL Cyrus+ is 
> stuck.
>
> I would need help from FSL Cyrus+ to get some logs or is there a way 
> we can spin of
> a QEMU guest of it? We should have the log to start somewhere.
>
>
It's difficult to get a log because it freezes and can't write any error 
messages to the log files. This bug is very old. We had this issue some 
years ago but we was able to disable PREEMPT because we don't need it.

-- Christian

-- 
Sent with BrassMonkey 34.3.2.1 (https://github.com/chzigotzky/Web-Browsers-and-Suites-for-Linux-PPC/releases/tag/BrassMonkey_34.3.2.1)


  reply	other threads:[~2026-09-18  2:40 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-14 14:02 [Linux PPC] KVM PR and KVM HV do not work if the kernel was compiled with PREEMPT Christian Zigotzky
2026-02-17  5:02 ` Shrikanth Hegde
2026-02-17  8:52   ` Christian Zigotzky
2026-02-17  9:03     ` Shrikanth Hegde
2026-02-17  9:44       ` Christian Zigotzky
2026-02-17 10:17         ` Madhavan Srinivasan
2026-02-17 10:26           ` Christian Zigotzky
2026-02-17 11:34             ` Shrikanth Hegde
2026-02-21  5:30               ` Christian Zigotzky
2026-02-23  3:45                 ` Shrikanth Hegde
2026-02-23 16:48                   ` [Linux PPC] 7.0-rc1: e500_mmu.c:923:26: error: assignment to 'struct tlbe_priv *' from incompatible pointer type 'struct tlbe_ref *' Christian Zigotzky
2026-02-23 18:07                     ` Christophe Leroy (CS GROUP)
2026-02-23 19:38                       ` Christophe Leroy (CS GROUP)
2026-02-23 22:40                         ` Kees Cook
2026-02-24  6:30                           ` Christian Zigotzky
2026-02-24  7:18                           ` Christophe Leroy (CS GROUP)
2026-02-25  5:54               ` [Linux PPC] Disable PREEMPT Christian Zigotzky
2026-02-25  6:23                 ` Shrikanth Hegde
2026-02-25  7:16                 ` Christophe Leroy (CS GROUP)
2026-02-25 11:36                   ` Peter Zijlstra
2026-02-26  5:37                   ` Christian Zigotzky
2026-02-26 13:24                     ` Christophe Leroy (CS GROUP)
2026-09-03  9:53                       ` Michal Suchánek
2026-09-03 10:56                         ` Shrikanth Hegde
2026-09-03 11:25                           ` Michal Suchánek
2026-09-03 11:31                             ` Shrikanth Hegde
2026-09-03 11:40                               ` Michal Suchánek
2026-09-03 12:04                                 ` Shrikanth Hegde
2026-09-03 12:25                                   ` Michal Suchánek
2026-09-03 12:36                                     ` Harsh Prateek Bora
2026-09-03 12:55                                       ` Michal Suchánek
2026-09-03 15:17                                         ` Amit Machhiwal
2026-09-03 13:28                                       ` Michal Suchánek
2026-09-04  7:39                                         ` Michal Suchánek
2026-09-21  8:06                                         ` Michal Suchánek
2026-09-21 16:46                                           ` Michal Suchánek
2026-09-21 17:20                                             ` Shrikanth Hegde
2026-09-22  8:22                                               ` Michal Suchánek
2026-09-03 17:22                             ` Shrikanth Hegde
2026-09-04  7:35                               ` Michal Suchánek
2026-09-04  9:04                                 ` Shrikanth Hegde
2026-09-10  8:59                                   ` Michal Suchánek
2026-09-10 10:41                                     ` Shrikanth Hegde
2026-09-10 11:29                                       ` Michal Suchánek
2026-09-10 12:16                                         ` Michal Suchánek
2026-09-11 17:09                                           ` Shrikanth Hegde
2026-09-14 10:58                                             ` Michal Suchánek
2026-09-15  5:47                                               ` Narayana Murty N
2026-09-15  7:35                                                 ` Michal Suchánek
2026-09-15  9:08                                                   ` Shrikanth Hegde
2026-09-16 18:11                                                     ` Shrikanth Hegde
2026-09-17 10:14                                                       ` Michal Suchánek
2026-09-17 10:28                                                         ` Shrikanth Hegde
2026-09-17 13:12                                                           ` Michal Suchánek
2026-09-17 14:15                                                             ` Shrikanth Hegde
2026-09-18  2:39                                                               ` Christian Zigotzky [this message]
2026-09-18  7:10                                                                 ` Michal Suchánek
2026-09-20 11:49                                                                   ` Christian Zigotzky
2026-09-20 13:04                                                                     ` Christian Zigotzky
2026-09-21  5:12                                                                       ` Shrikanth Hegde
2026-09-23  5:09                                                                         ` Christian Zigotzky
2026-09-23  5:13                                                                           ` Shrikanth Hegde
2026-09-23 16:01                                                                             ` Christian Zigotzky
2026-09-23 18:42                                                                               ` Shrikanth Hegde
2026-09-24 17:47                                                                                 ` Christian Zigotzky
2026-09-25  6:40                                                                                   ` Shrikanth Hegde
2026-09-18  9:26                                                               ` Shrikanth Hegde
2026-09-18 11:52                                                                 ` Michal Suchánek
2026-09-04  8:55                               ` Christian Zigotzky
2026-09-04  9:20                                 ` Christian Zigotzky
2026-09-04  9:24                                   ` Shrikanth Hegde
2026-09-04  9:34                                     ` Christian Zigotzky
2026-09-05 13:07                                       ` Christian Zigotzky
2026-09-07  8:50                                         ` Michal Suchánek
2026-09-07 11:32                                           ` Christian Zigotzky
2026-09-10  8:54                                             ` Michal Suchánek
2026-09-10 10:31                                               ` Michal Suchánek
2026-09-10 11:31                                                 ` Michal Suchánek

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