Re: August 2025 stabilization week

On Tue, Aug 26, 2025 at 7:32 PM Gleb Smirnoff <glebius@freebsd.org> wrote:

>
> The performance & stability A/B testing at Netflix just started and we
> expect to have results tomorrow.
>
> I will be AFK for the rest of the week, and thus passing responsibility
> for the stabweek on Olivier Cochard olivier@.  He will update on the
> A/B test results, collect any success/failure reports and close the
> week.
>
> --
> Gleb Smirnoff
>

Wednesday update:

- We noticed a 100% reproducible kernel panic while running the ZFS
regression tests (cd /usr/tests; kyua test sys/cddl/zfs/tests/). This issue
was reported here: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289131

- Our daily A/B test (22-hour run on 32 CDN servers total) at Netflix
didn't show any regression or stability issues (stabweek July vs August). I
was expecting more visible differences due to the OpenSSL upgrade, but I
will have to wait for our long AB/BA performance results to get valuable
data about this.

- I've noticed that some of our ARM EC2 instances attach their ephemeral
disk with a delay and display this error message in dmesg:
cam_periph_alloc: attempt to re-allocate valid device nda0 rejected flags
0x100 refcount 4
ndaasync: Unable to attach to new device due to status 0x6

I'm still waiting for our contributions about this stabweek before closing
the week.

Regards,
Olivier