Date: Wed, 9 Dec 2015 15:31:26 -0600 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: Something in r291926 (and earlier) causes reboots during periodic daily (14 jails on system) Message-ID: <56689DAE.7030802@denninger.net> In-Reply-To: <3923D6D6-E907-4B6C-931A-12CD7B863415@ebureau.com> References: <20151209090049.000003db@Leidinger.net> <5667E86F.3050906@quip.cz> <20151209105144.000035be@Leidinger.net> <3923D6D6-E907-4B6C-931A-12CD7B863415@ebureau.com>
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This is a cryptographically signed message in MIME format. --------------ms010307030109000509030109 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I doubt very much that's involved; I have multiple production systems with dynamic_write_buffer turned on and I've yet to see a panic from periodic activity or anything like it. The only panic I've got open right now that's related to ZFS happens during a send/receive backup and it's able to be reproduced only with difficulty (it looks to be a problem in snapshot management as I've isolated it fairly well but haven't yet found the root cause) -- and it can be coaxed out of a bare "clean" -STABLE install with no ZFS patches in at all. (The codepath that results in the panic doesn't have a logical connection to that patch, but I tested without it anyway just to make sure.) On 12/9/2015 15:15, Dustin Wenz wrote: > Are you by chance using the ARC patch from this PR? > > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D187594 > > Do you have a vfs.zfs.dynamic_write_buffer tunable defined, if so, what= is it set to? > > - .Dustin > > >> On Dec 9, 2015, at 3:51 AM, Alexander Leidinger <Alexander@Leidinger.n= et> wrote: >> >> On Wed, 09 Dec 2015 09:38:07 +0100 >> Miroslav Lachman <000.fbsd@quip.cz> wrote: >> >>> Alexander Leidinger wrote on 12/09/2015 09:00: >>>> Does this ring a bell for someone or any ideas before I try to hunt >>>> this down? >>> The same problem was reported yesterday on Stable >>> >>> Periodic jobs triggering panics in 10.1 and 10.2 >>> https://lists.freebsd.org/pipermail/freebsd-stable/2015-December/0838= 07.html >>> >>> Also ZFS with jails. >> The above mail has a backtrace involving ZFS. >> >> I'm running the periodic scripts serially now, 8 out of 14 already >> finished without issues. Smells like a concurrency issue. I would >> assume it's something introduced between 5 and 1 month ago and MFCed >> back to 10. >> >> Does this ring a bell for someone on fs@? >> >> Bye, >> Alexander. >> >> --=20 >> http://www.Leidinger.net Alexander@Leidinger.net: PGP 0xC773696B3BAC17= DC >> http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0xC773696B3BAC17= DC >> _______________________________________________ >> freebsd-stable@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-stable >> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.o= rg" > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.or= g" --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms010307030109000509030109 Content-Type: application/pkcs7-signature; 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