From: Srikar Dronamraju <srikar@linux.ibm.com>
To: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Venkat Rao Bagalkote <venkat88@linux.ibm.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Ritesh Harjani <riteshh@linux.ibm.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
linux-sched@vger.kernel.org, tim.c.chen@linux.intel.com,
K Prateek Nayak <kprateek.nayak@amd.com>,
Peter Zijlstra <peterz@infradead.org>,
"Chen, Yu C" <yu.c.chen@intel.com>
Subject: Re: [BUG] sched/cache: "Make LLC id continuous" causes NULL cpumask dereference in build_sched_domains on POWER9
Date: Thu, 28 May 2026 21:31:21 +0530 [thread overview]
Message-ID: <ahhm0dwSKiFt4bDj@linux.ibm.com> (raw)
In-Reply-To: <eaefc945-f2e5-458c-9d63-ead737c982bf@linux.ibm.com>
* Shrikanth Hegde <sshegde@linux.ibm.com> [2026-05-27 12:35:20]:
> On 5/26/26 10:54 AM, Venkat Rao Bagalkote wrote:
> >
> > On 26/05/26 9:38 am, Chen, Yu C wrote:
> > > Hi Venkat,
> > >
> > > On 5/26/2026 11:14 AM, Srikar Dronamraju wrote:
> > > > * Chen, Yu C <yu.c.chen@intel.com> [2026-05-25 23:35:45]:
> > > >
> > > > > Hi Venkat,
> > > > >
> > > > > On 5/25/2026 10:07 PM, Venkat Rao Bagalkote wrote:
> > > > > > Greetings!!!
> > > > > >
> > > > > > I am seeing an early boot kernel panic due to NULL pointer dereference
> > > > > > on a POWER9 (pSeries) system when testing linux-next (next-20260522).
> >
> >
> > This issue is seen on P11 as well.
> >
> >
> > Regards,
> >
> > Venkat.
> >
>
> Venkat,
>
> Was it on P11 on Shared LPAR?
I also thought the same.
But I checked with Venkat, he said it was on a dedicated LPAR.
My multiple tries on dedicated, didnt reproduce the problem.
--
Thanks and Regards
Srikar Dronamraju
next prev parent reply other threads:[~2026-05-28 16:01 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-25 14:07 [BUG] sched/cache: "Make LLC id continuous" causes NULL cpumask dereference in build_sched_domains on POWER9 Venkat Rao Bagalkote
2026-05-25 15:35 ` Chen, Yu C
2026-05-25 16:16 ` K Prateek Nayak
2026-05-26 3:14 ` Chen, Yu C
2026-05-26 3:14 ` Srikar Dronamraju
2026-05-26 4:08 ` Chen, Yu C
2026-05-26 4:58 ` Srikar Dronamraju
2026-05-26 5:53 ` K Prateek Nayak
2026-05-26 14:08 ` [BUG] sched/cache: "Make LLC id continuous" causes NULL cpumask Chen Yu
2026-05-27 7:01 ` Shrikanth Hegde
2026-05-27 16:05 ` Chen, Yu C
2026-05-27 18:07 ` Shrikanth Hegde
2026-05-28 4:58 ` Shrikanth Hegde
2026-05-28 9:12 ` Chen, Yu C
2026-05-28 10:26 ` Shrikanth Hegde
2026-05-28 15:54 ` Srikar Dronamraju
2026-05-28 15:58 ` Srikar Dronamraju
2026-05-27 16:30 ` K Prateek Nayak
2026-05-26 5:24 ` [BUG] sched/cache: "Make LLC id continuous" causes NULL cpumask dereference in build_sched_domains on POWER9 Venkat Rao Bagalkote
2026-05-27 7:05 ` Shrikanth Hegde
2026-05-28 16:01 ` Srikar Dronamraju [this message]
2026-05-28 6:54 ` Ritesh Harjani
2026-05-28 16:06 ` Srikar Dronamraju
2026-05-28 11:27 ` Shrikanth Hegde
2026-05-28 13:21 ` Chen, Yu C
2026-05-28 15:06 ` Ritesh Harjani
2026-05-28 15:56 ` Srikar Dronamraju
2026-05-28 16:31 ` Shrikanth Hegde
2026-05-28 16:44 ` Srikar Dronamraju
2026-05-29 3:58 ` Shrikanth Hegde
2026-05-29 6:59 ` Venkat Rao Bagalkote
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