Date: Wed, 04 Jun 2014 13:25:03 -0700 From: Mike Carlson <mike@bayphoto.com> To: Steven Hartland <killing@multiplay.co.uk>, freebsd-fs@freebsd.org Subject: Re: ZFS Kernel Panic on 10.0-RELEASE Message-ID: <538F809F.5090705@bayphoto.com> In-Reply-To: <C5AA7E9C30F043E593369059F40EC254@multiplay.co.uk> References: <5388D64D.4030400@bayphoto.com> <EC2EA442-56FC-46B4-A1E2-97523029B7B3@mail.turbofuzz.com> <5388E5B4.3030002@bayphoto.com> <538BBEB7.4070008@bayphoto.com> <782C34792E95484DBA631A96FE3BEF20@multiplay.co.uk> <538C9CF3.6070208@bayphoto.com> <16ADD4D9DC73403C9669D8F34FDBD316@multiplay.co.uk> <538CB3EA.9010807@bayphoto.com> <6C6FB182781541CEBF627998B73B1DB4@multiplay.co.uk> <538CC16A.6060207@bayphoto.com> <F959477921CD4552A94BF932A55961F4@multiplay.co.uk> <538CDB7F.2060408@bayphoto.com> <88B3A7562A5F4F9B9EEF0E83BCAD2FB0@multiplay.co.uk> <538CE2B3.8090008@bayphoto.com> <85184EB23AA84607A360E601D03E1741@multiplay.co.uk> <538D0174.6000906@bayphoto.com> <F445995D86AA44FB8497296E0D41AC8F@multiplay.co.uk> <538D18CB.5020906@bayphoto.com> <538D1CD5.5070902@bayphoto.com> <C7A3A403F308403B99A4BD39D48521D8@multiplay.co.uk> <538DF082.3030407@bayphoto.com> <538F699E.4060802@bayphoto.com> <C5AA7E9C30F043E593369059F40EC254@multiplay.co.uk>
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This is a cryptographically signed message in MIME format. --------------ms080007050900000709090902 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable Thanks Steve, I'll write up a summary for the openzfs-developers mailing = list. FWIW, the other server that is identical to this working-1 system was=20 built with a fresh 10.0-RELEASE install, and we haven't had any issues,=20 and its been up and running for months now. On 6/4/2014 12:23 PM, Steven Hartland wrote: > You mention mfi and 9.1, which rings alarm bells. > > They shouldn't be, but if your drives are > 2^32 sectors you'll > have corruption: > http://svnweb.freebsd.org/base?view=3Drevision&revision=3D242497 > > In addition to this I did a large number of fixes to mfi after > this point which could result in all sorts of issues, but that > doesn't explain issues with mps. > > Upgrading shouldn't have removed the cache file so I'm guessing > that your initial install was already missing this. > > zdb is picky about havin a cache file, which is something we > should fix at some point as IIRC the changes avg or mav made, > I can't remember which, means that FreeBSD doesn't rely on the cache=20 > file being present as much as it did. > > Back to the corruption, unfortunately this could be any number > of things so its almost impossible to tell at which point the > issue originally occured :( > > It might well be worth emailing a summary of the issue to the > openzfs mailing list see if someone on there has any ideas > where the DVA corruption could have occured. > > Regards > Steve > > ----- Original Message ----- From: "Mike Carlson" <mike@bayphoto.com> > To: <freebsd-fs@freebsd.org> > Sent: Wednesday, June 04, 2014 7:46 PM > Subject: Re: ZFS Kernel Panic on 10.0-RELEASE > > > Top-posting... sorry > > I'm going to have to roll this particular server back into production, = > so I'll be rebuilding it from scratch > > That is okay with this particular system, the other server that=20 > exhibited the same issue will have to have all 19TB of its usable data = > streamed off to temp storage (if we can get it) and rebuilt as well. > > Thank you Steve for being so helpful, and patient with me stumbling=20 > through kgdb :) > > > I have some lingering questions about the entire situation: > > First, these servers perform regular zpool scrubs (once a month), and=20 > have ECC memory. According the the additional logging information I=20 > was able to get from Steve's patch, it seems that even with these=20 > safeguards data was still corrupted. A scub after the initial panic=20 > did not report any errors. > > Second, these two servers had an extra anomaly, and that was the=20 > missing zpool.cache. I say missing, because zdb was unable to access=20 > the zpool, it was not until I ran "zpool set=20 > cachefile=3D/boot/zfs/zpool.cache <pool>". This was previously not an=20 > issue. > > The two servers were upgraded fro 9.1 to 10 on the same morning,=20 > within minutes of each other. That is about it as far as=20 > commonalities. Both have different drive types (900GB SAS vs 2TB=20 > SATA), different controllers (Dell PERC (mfi) vs LSI (mps)), Dell vs=20 > SuperMicro boards... > > We do use the aio kernel module, and as well as some sysctl and=20 > loader.conf tuning. I've backed all of those out, so we're just=20 > running a stock OS. > > Ideally, I would like to never run into this situation again. However, = > I don't have any evidence to point to an upgrade misstep or some=20 > catastrophic configuration error (kernel parameters, zpool create). > > > Thank everyone, > Mike C --------------ms080007050900000709090902 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIITIjCC BhwwggQEoAMCAQICCGWP9DPVdj3ZMA0GCSqGSIb3DQEBCwUAMEsxDzANBgNVBAMMBlJvb3RD QTEWMBQGA1UECgwNQmF5IFBob3RvIExhYjETMBEGA1UECAwKQ2FsaWZvcm5pYTELMAkGA1UE BhMCVVMwHhcNMTIxMDIzMTczMjE4WhcNMjcxMDIzMTczMjE4WjBYMRwwGgYDVQQDDBNCYXkg UGhvdG8gUGVvcGxlIENBMRYwFAYDVQQKDA1CYXkgUGhvdG8gTGFiMRMwEQYDVQQIDApDYWxp Zm9ybmlhMQswCQYDVQQGEwJVUzCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBALuW vZE7FFSO77jEhdT/dZzu0XnPS35aepuvMvCNTagnNMbaf+AKrLZFaVRqBt4f6yl5TDXNEAMI 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