Date: Wed, 12 Jul 2017 13:20:55 -0700 From: Peter Wemm <peter@wemm.org> To: Current <current@freebsd.org> Subject: Caveat emptor: Beware of ZFS on HEAD Message-ID: <2830123.MIUbdsJfkU@overcee.wemm.org>
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--nextPart2313450.qoWcZDlQWb Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="us-ascii" We mostly run HEAD in the freebsd.org cluster. Sometime in the last fe= w weeks=20 an ugly zfs problem has surfaced. If a redundant volume is degraded, zf= s=20 panics on boot. If a drive fails while running, or is manually put off= line, zfs=20 panics the same way. I do not have a smoking gun, but I am suspicious of the June 28th commi= ts=20 (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 pani= c only=20 happens when a raidz (and presumably mirror) degrades. Your laptop etc= should=20 be fine. I apologize for being vague - I do not know more. Folks running HEAD sh= ould=20 take appropritate precautions (eg: keeping a known-good kernel.old and = modules=20 around). This is always advisable when running HEAD anyway, particular= ly so=20 now. For us, a kernel.old from June 18th worked fine. =2D-=20 Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com; KI= 6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246 --nextPart2313450.qoWcZDlQWb Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEBgrA0Vr/vfNVuPoUNdaXCeyAngQFAllmhKcACgkQNdaXCeyA ngQbVwgAwFUY7+xntVLNfUgK3SchTvxkDCMXO0YecLmdFHCtWSeuxpvV+EUJoOs7 hnZXy7IxRTh92F9g3dRh4M9ifsgE7ubgD/o/vcDR0uprsBQVEUECTaVL9sTRwm6A 9eyVKHnfiB3YmT7GdQCW45zyYotXLJ6vDb4m322V8tgonMv9k1lmIqQfYy6tpFyO YOwlVWBEc+9XcjQIys5t0ZkNinzv0wP+rv89fYBRsx1W4byY33oi6KikQ2ccT7VB eBM509hLoaFlSgcxIe+kZ6pssMAEqhQ+ADD7uggnTMylnxNwH0zflV0u42jOZiQX 1aCc10De/RvTfj4jFXCFRfxFV4qptw== =XwTW -----END PGP SIGNATURE----- --nextPart2313450.qoWcZDlQWb--
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