linux-kernel - Re: next-20250805: ampere: WARNING: kernel/cgroup/cpuset.c:1352 at remote_partition

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Message-ID: <530b6d8f-8987-4fd7-9add-eed0a823b411@redhat.com>
Date: Tue, 2 Sep 2025 14:47:07 -0400
From: Waiman Long <llong@...hat.com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>,
 Michal Koutný <mkoutny@...e.com>
Cc: Cgroups <cgroups@...r.kernel.org>,
 "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>,
 open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org,
 Linux Regressions <regressions@...ts.linux.dev>, Tejun Heo <tj@...nel.org>,
 Johannes Weiner <hannes@...xchg.org>,
 Dan Carpenter <dan.carpenter@...aro.org>,
 Anders Roxell <anders.roxell@...aro.org>, Arnd Bergmann <arnd@...db.de>,
 kamalesh.babulal@...cle.com
Subject: Re: next-20250805: ampere: WARNING: kernel/cgroup/cpuset.c:1352 at
 remote_partition_disable


On 9/2/25 6:58 AM, Naresh Kamboju wrote:
> On Tue, 26 Aug 2025 at 19:56, Michal Koutný <mkoutny@...e.com> wrote:
>> Hi.
>>
>> On Thu, Aug 07, 2025 at 01:57:34PM +0530, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>>> Regressions noticed intermittently on AmpereOne while running selftest
>>> cgroup testing
>>> with Linux next-20250805 and earlier seen on next-20250722 tag also.
>>>
>>> Regression Analysis:
>>> - New regression? Yes
>>> - Reproducibility? Intermittent
>>>
>>> First seen on the next-20250722 and after next-20250805.
>> Naresh, can you determine also the last good revision? That would be
>> ideal to have some endpoints for bisection. (To look for any interacting
>> changes that Waiman was getting at.)
> Michal,
> Since this was an intermittent issue, I do not have a good end point
> of the bisection.
>
> As I repeat,
> First seen on the next-20250722 and after next-20250805
> and not seen after this.

If this problem hasn't been seen again after next-20250805, it is 
probably caused by a bug in one of the new commits that has since been 
fixed. We are not going to look further into this until it is reproduced 
again.

Cheers,
Longman