Re: November 2025 stabilization week

Hello everyone,

There is a critical regression related to the zfsbootcfg/bectl utility.

The issue was encountered when attempting to upgrade one of our clusters
that was already running a Nov 2025 stabweek. The bug prevents successful
activation of a new boot environment via bectl activate -t xxx.

Given that this regression actively prevents system upgrades and new
deployments, it appears to be a serious blocker.

The issue match this Bugzilla:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291211

Regards,
Olivier

On Wed, Nov 26, 2025 at 12:31 AM Olivier Cochard-Labbé <olivier@freebsd.org>
wrote:

> Hello everyone,
>
> This is an update on the current November 2025 stabilization week on our
> Netflix A/B test deployment.
> We had one significant finding:
> dhw@ noticed a regression (higher system CPU utilization), which was
> quickly troubleshooted by gallatin@, patched by chs@, and pushed by imp@.
> This was excellent teamwork!
> The fix is in the following commit:
> "git: 2b4dbad2db57 - main - nda: fix setting of unmappedio flag"
>
> On my end, my personal build machine, Workstation, NAS, and laptop have
> all been upgraded, and I have not observed any further regressions.
>
> Separately, reading the -current mailing list, thj@ reported an issue
> with the 20251124 16-CURRENT snapshot, which appears to be very close to
> the stabweek state. You can view the report here:
> https://lists.freebsd.org/archives/freebsd-current/2025-November/009491.html
>
> I will keep the stabilization window open for one more day to allow for
> any final reports before officially closing the stabweek.
>
> Regards,
>
> Olivier
>
> On Mon, Nov 24, 2025 at 10:00 AM Gleb Smirnoff <glebius@freebsd.org>
> wrote:
>
>>   Hi FreeBSD/main users & developers:
>>
>> This is an automated email to inform you that the November 2025
>> stabilization week
>> started with FreeBSD/main at main-n282109-a067eb525e10, which was tagged
>> as
>> main-stabweek-2025-Nov.
>>
>> Those who want to participate in the stabilization week are encouraged to
>> update to the above revision/tag and test their systems.
>>
>> The tag main-stabweek-2025-Nov has been published at Gleb Smirnoff's
>> github repo.
>> To connect this repo as an additional remote you need to run:
>>
>>   git remote add glebius https://github.com/glebius/FreeBSD
>>
>> Once remote is configured, to checkout the tag run:
>>
>>   git fetch glebius --tags
>>   git checkout main-stabweek-2025-Nov
>>
>> If you want to use only the official FreeBSD repo, then update to
>> the revision:
>>
>>   git pull
>>   git checkout a067eb525e10
>>
>> Developers are encouraged to avoid pushing new features to FreeBSD/main
>> during
>> the stabilization week, but focus on bugfixes instead.  The stabilization
>> week
>> runs up to Friday 18:00 UTC, but if there is consensus that any
>> regressions
>> discovered by participants have been fixed, it will end early.
>>
>> Once that happens, the advisory freeze of FreeBSD/main branch is thawed.
>>
>> --
>> Gleb Smirnoff
>>
>>