Re: Caveat emptor: Beware of ZFS on HEAD

Thumbs up, gentlemen!

Regards,
Edwin

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On Mon, Jul 17, 2017 at 8:35 AM, Andriy Gapon <avg_at_freebsd.org> wrote:

> On 12/07/2017 23:20, Peter Wemm wrote:
> > We mostly run HEAD in the freebsd.org cluster.  Sometime in the last
> few weeks
> > an ugly zfs problem has surfaced. If a redundant volume is degraded, zfs
> > panics on boot.  If a drive fails while running, or is manually put
> offline, zfs
> > panics the same way.
> >
> > I do not have a smoking gun, but I am suspicious of the June 28th commits
> > (starting at r320156) and their follow-ups. eg: r320452.
> >
> > https://bugs.freebsd.org/220691
> >
> > I believe single disk systems will *not* be affected by this - the panic
> only
> > happens when a raidz (and presumably mirror) degrades.  Your laptop etc
> should
> > be fine.
> >
> > I apologize for being vague - I do not know more. Folks running HEAD
> should
> > take appropritate precautions (eg: keeping a known-good kernel.old and
> modules
> > around).  This is always advisable when running HEAD anyway,
> particularly so
> > now.  For us, a kernel.old from June 18th worked fine.
> >
>
> My apologies for the bug.
> Everyone affected, could you please test the patch from the bug report?
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220691#c3
> Thank you!
>
> --
> Andriy Gapon
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