From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f178.google.com ([209.85.223.178]:35094 "EHLO mail-ie0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753378AbbGPLlW (ORCPT ); Thu, 16 Jul 2015 07:41:22 -0400 Received: by iecuq6 with SMTP id uq6so53773697iec.2 for ; Thu, 16 Jul 2015 04:41:22 -0700 (PDT) Message-ID: <55A79854.6020309@gmail.com> Date: Thu, 16 Jul 2015 07:41:08 -0400 From: Austin S Hemmelgarn MIME-Version: 1.0 To: Chris Murphy , Btrfs BTRFS Subject: Re: BTRFS raid6 unmountable after a couple of days of usage. References: <55A4F74D.9000305@gmail.com> <55A50DBF.1080602@gmail.com> <55A63F03.2080207@gmail.com> <20150715161546.GR10539@carfax.org.uk> In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms050004090008000303090404" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms050004090008000303090404 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-07-15 17:29, Chris Murphy wrote: > On Wed, Jul 15, 2015 at 10:15 AM, Hugo Mills wrote= : > >> There is at least one superblock on every device, usually two, and= >> often three. Each superblock contains the virtual address of the roots= >> of the root tree, the chunk tree and the log tree. Those are useless >> without having the chunk tree, so there's also some information about >> the chunk tree appended to the end of each superblock to bootstrap the= >> virtual address space lookup. > > So maybe Austin can use btrfs-show-super -a on every device and see if > there's anything different on some of the devices, that shouldn't be > different? There must be something the kernel is tripping over that > the use space tools aren't for some reason. > > > > I actually did do so when this happened most recently (I just didn't=20 think to mention it in the most recent e-mail), and nothing appeared to=20 be different either between devices or within a given device (IIRC,=20 there's 2 sb per device in each of the filesystems in question). I'm going to try and reproduce this in a VM for inspection as all the=20 filesystems I had this issue with now seem to be working fine (with the=20 exception of some errors in the data blocks of one that got caught by=20 scrub). --------------ms050004090008000303090404 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIGuDCC BrQwggScoAMCAQICAxBuVTANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNTAz MjUxOTM0MzhaFw0xNTA5MjExOTM0MzhaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCdD/zW 2rRAFCLnDfXpWxU1+ODqRVUgzHvrRO7ADUxRo1CBDc3JSX5TIW2OGmQ3DAKGOACp8Z0sgxMc B05tzAZ/M7m4jajVrwwdVCdrwVGxTdAai7Kwg4ZCVfyMVhcwo8R2eW3QahBx34G0RKumK9sZ ZQSQ+zULAzpY6uz7T1sAk/erMoivRXF6u8WvOsLkOD1F/Xyv1ZccSUG5YeDgZgc0nZUBvyIp zXSHjgWerFkrxEM3y2z/Ff3eL1sgGYecV/I1F+I5S01V7Kclt/qRW10c/4JEGRcI1FmrJBPu BtMYPbg/3Y9LZROYN+mVIFxZxOfrmjfFZ96xt/TaMXo8vcEKtWcNEjhGBjEbfMUEm4aq8ygQ 4MuEcpJc8DJCHBkg2KBk13DkbU2qNepTD6Uip1C+g+KMr0nd6KOJqSH27ZuNY4xqV4hIxFHp ex0zY7mq6fV2o6sKBGQzRdI20FDYmNjsLJwjH6qJ8laxFphZnPRpBThmu0AjuBWE72GnI1oA aO+bs92MQGJernt7hByCnDO82W/ykbVz+Ge3Sax8NY0m2Xdvp6WFDY/PjD9CdaJ9nwQGsUSa N54lrZ2qMTeCI9Vauwf6U69BA42xgk65VvxvTNqji+tZ4aZbarZ7el2/QDHOb/rRwlCFplS/ z4l1f1nOrE6bnDl5RBJyW3zi74P6GwIDAQABo4IBWTCCAVUwDAYDVR0TAQH/BAIwADBWBglg hkgBhvhCAQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg b3ZlciB0byBodHRwOi8vd3d3LkNBY2VydC5vcmcwDgYDVR0PAQH/BAQDAgOoMEAGA1UdJQQ5 MDcGCCsGAQUFBwMEBggrBgEFBQcDAgYKKwYBBAGCNwoDBAYKKwYBBAGCNwoDAwYJYIZIAYb4 QgQBMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDovL29jc3AuY2FjZXJ0Lm9y ZzAxBgNVHR8EKjAoMCagJKAihiBodHRwOi8vY3JsLmNhY2VydC5vcmcvcmV2b2tlLmNybDA0 BgNVHREELTArgRRhaGZlcnJvaW43QGdtYWlsLmNvbYETYWhlbW1lbGdAb2hpb2d0LmNvbTAN BgkqhkiG9w0BAQ0FAAOCAgEAGvl7xb42JMRH5D/vCIDYvFY3dR2FPd5kmOqpKU/fvQ8ovmJa p5N/FDrsCL+YdslxPY+AAn78PYmL5pFHTdRadT++07DPIMtQyy2qd+XRmz6zP8Il7vGcEDmO WmMLYMq4xV9s/N7t7JJp6ftdIYUcoTVChUgilDaRWMLidtslCdRsBVfUjPb1bF5Ua31diKDP e0M9/e2CU36rbcTtiNCXhptMigzuL3zJXUf2B9jyUV8pnqNEQH36fqJ7YTBLcpq3aYa2XbAH Hgx9GehJBIqwspDmhPCFZ/QmqUXCkt+XfvinQ2NzKR6P3+OdYbwqzVX8BdMeojh7Ig8x/nIx mQ+/ufstL1ZYp0bg13fyK/hPYSIBpayaC76vzWovkIm70DIDRIFLi20p/qTd7rfDYy831Hjm +lDdCECF9bIXEWFk33kA97dgQIMbf5chEmlFg8S0e4iw7LMjvRqMX3eCD8GJ2+oqyZUwzZxy S0Mx+rBld5rrN7LsXwZ671HsGqNeYbYeU25e7t7/Gcc6Bd/kPfA+adEuUGFcvUKH3trDYqNq 6mOkAd8WO/mQadlc3ztS++XDMhmIpfBre9MPAr6usqf+wc+R8Nk9KLK39kEgrqVfzc/fgf8L MaD4rHnusdg4gca6Yi+kNrm99anw7SwaBrBvULYBp7ixNRUhaYiNW4YjTrYxggShMIIEnQIB ATCBgDB5MRAwDgYDVQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5v cmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEW EnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5VMAkGBSsOAwIaBQCgggH1MBgGCSqGSIb3DQEJAzEL BgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE1MDcxNjExNDEwOFowIwYJKoZIhvcNAQkE MRYEFAFPk7mfbWREFyy04U85Hf2QhQ+HMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEq MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwIC AUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgZEGCSsGAQQBgjcQBDGBgzCBgDB5MRAwDgYD VQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMT GUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2Fj ZXJ0Lm9yZwIDEG5VMIGTBgsqhkiG9w0BCRACCzGBg6CBgDB5MRAwDgYDVQQKEwdSb290IENB MR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2ln bmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5V MA0GCSqGSIb3DQEBAQUABIICAI8AS55LADUwKu+7zOghFrvj7sJLykpDgXHb9MrosJwHxytF 7G7eT9GyvyvkLG99/jlzUtKlpW+zb4G+7VP7UoA/j8pbDehnT6CSEWRQP+FCTyhwZcq9HpqZ fnlKSgdafZ8dye6s+vGj6u1GIt+4YToaKtufWoZumC28AsHvjFtm9OvUtyp0is/jLwAJgfUZ fAhcpBybE5VnM9Q06v5eMnUvOwmIMgsCkpmtlTdn9b4nZBnQDPhTeKKpNIBplJoppZoUn05+ leCQ6CHTLmmcr5bGvxr2585zwofDH3YZvPCHSqf5S4mtyTXG0IvBZS8MVgFPFEeJq8Xwp8/W dgl2USZN0hrTjQ73oNpHxhOTN44qmvSObF9TjBPGbfz6U1rwboCiS+t9kFAFCu8gq3kKJN0I WK/FLlp76fsZkmDvOah/1O/CLrUUAR6MZ62SeozxE4MVlZn7dmMFBTqMt4uDEeHQbUCPrS64 Kr8Wqj6ProudEKCwVtr4irpeLnHsbIusIdUiUbu3IpBGAuD2EEH+uy24ZvzAOMDyvkq1AIUE 5sceychnxNVa5yuNaxNo6PWiYv5tw14XA2iFIHaoAuaWjDkwuR+d6Etx3szNW7i89gmwp/+C SCl8tGboTc8CPvSE2Uh5ONtnMnEJMHia/kE4+vew3bELwc/oy8atQYNpBuqFAAAAAAAA --------------ms050004090008000303090404--