Date: Mon, 17 Jul 2017 09:35:54 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Peter Wemm <peter@wemm.org>, Current <current@FreeBSD.org> Subject: Re: Caveat emptor: Beware of ZFS on HEAD Message-ID: <2cd885e1-737b-b8fc-e446-7249ca92f04d@FreeBSD.org> In-Reply-To: <2830123.MIUbdsJfkU@overcee.wemm.org> References: <2830123.MIUbdsJfkU@overcee.wemm.org>
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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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