From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f176.google.com ([209.85.213.176]:37154 "EHLO mail-ig0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751702AbbKQMjf (ORCPT ); Tue, 17 Nov 2015 07:39:35 -0500 Received: by igcto18 with SMTP id to18so12157913igc.0 for ; Tue, 17 Nov 2015 04:39:34 -0800 (PST) Subject: Re: BTRFS Error - Rockstor To: Scotty Edmonds , Qu Wenruo , Hugo Mills , Donald Pearson References: <20151112225701.GD24333@carfax.org.uk> <5645492B.9080808@cn.fujitsu.com> <56492C32.5000107@cn.fujitsu.com> <564AD8C5.2040609@cn.fujitsu.com> Cc: Btrfs BTRFS From: Austin S Hemmelgarn Message-ID: <564B1FD5.4060101@gmail.com> Date: Tue, 17 Nov 2015 07:38:45 -0500 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms090408040208000609090605" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms090408040208000609090605 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-11-17 03:08, Scotty Edmonds wrote: > Sorry, I'm not at all familiar with backtrace. > General procedure to get a backtrace on a system without core files: 1. Make sure you have debugging symbols installed for the program you=20 want the backtrace for, and ideally any libraries it uses. (These=20 usually are in packages with names ending in -dbg or -debug. In the=20 case of btrfs, you'll probably need symbols for glibc, lzo, and zlib). 2. Start the program under gdb ('gdb /sbin/btrfs') 3. When gdb is done loading, type in 'start' followed by the arguments=20 for the program (in this case, 'rescue chunk-recover -y /dev/sdg') 4. If gdb then says something about stopping at a breakpoint, enter the=20 command 'continue'. 5. When the program being debugged crashes, you should get a backtrace=20 from gdb, if not, you can enter the command 'bt' to tell it to dump a=20 backtrace. 6. After copying the backtrace somewhere you can put it in an e-mail,=20 you can exit gdb with the 'exit' command, it may complain about=20 something still running, it's safe to tell it to kill this process. If instead you have your system configured for core dumps: 1. Make sure you have debugging symbols installed for the program you=20 want the backtrace for, and ideally any libraries it uses. 2. Run gdb with the program and core file ('gdb /sbin/btrfs=20 /path/to/core/file'). 3. Enter the command 'bt to get a backtrace. --------------ms090408040208000609090605 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Brgwgga0MIIEnKADAgECAgMRLfgwDQYJKoZIhvcNAQENBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTUwOTIxMTEzNTEzWhcNMTYwMzE5MTEzNTEzWjBjMRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz ZXIxIzAhBgkqhkiG9w0BCQEWFGFoZmVycm9pbjdAZ21haWwuY29tMSIwIAYJKoZIhvcNAQkB FhNhaGVtbWVsZ0BvaGlvZ3QuY29tMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA nQ/81tq0QBQi5w316VsVNfjg6kVVIMx760TuwA1MUaNQgQ3NyUl+UyFtjhpkNwwChjgAqfGd LIMTHAdObcwGfzO5uI2o1a8MHVQna8FRsU3QGouysIOGQlX8jFYXMKPEdnlt0GoQcd+BtESr pivbGWUEkPs1CwM6WOrs+09bAJP3qzKIr0VxervFrzrC5Dg9Rf18r9WXHElBuWHg4GYHNJ2V Ab8iKc10h44FnqxZK8RDN8ts/xX93i9bIBmHnFfyNRfiOUtNVeynJbf6kVtdHP+CRBkXCNRZ qyQT7gbTGD24P92PS2UTmDfplSBcWcTn65o3xWfesbf02jF6PL3BCrVnDRI4RgYxG3zFBJuG qvMoEODLhHKSXPAyQhwZINigZNdw5G1NqjXqUw+lIqdQvoPijK9J3eijiakh9u2bjWOMaleI SMRR6XsdM2O5qun1dqOrCgRkM0XSNtBQ2JjY7CycIx+qifJWsRaYWZz0aQU4ZrtAI7gVhO9h pyNaAGjvm7PdjEBiXq57e4QcgpwzvNlv8pG1c/hnt0msfDWNJtl3b6elhQ2Pz4w/QnWifZ8E BrFEmjeeJa2dqjE3giPVWrsH+lOvQQONsYJOuVb8b0zao4vrWeGmW2q2e3pdv0Axzm/60cJQ haZUv8+JdX9ZzqxOm5w5eUQSclt84u+D+hsCAwEAAaOCAVkwggFVMAwGA1UdEwEB/wQCMAAw VgYJYIZIAYb4QgENBEkWR1RvIGdldCB5b3VyIG93biBjZXJ0aWZpY2F0ZSBmb3IgRlJFRSBo ZWFkIG92ZXIgdG8gaHR0cDovL3d3dy5DQWNlcnQub3JnMA4GA1UdDwEB/wQEAwIDqDBABgNV HSUEOTA3BggrBgEFBQcDBAYIKwYBBQUHAwIGCisGAQQBgjcKAwQGCisGAQQBgjcKAwMGCWCG SAGG+EIEATAyBggrBgEFBQcBAQQmMCQwIgYIKwYBBQUHMAGGFmh0dHA6Ly9vY3NwLmNhY2Vy dC5vcmcwMQYDVR0fBCowKDAmoCSgIoYgaHR0cDovL2NybC5jYWNlcnQub3JnL3Jldm9rZS5j cmwwNAYDVR0RBC0wK4EUYWhmZXJyb2luN0BnbWFpbC5jb22BE2FoZW1tZWxnQG9oaW9ndC5j b20wDQYJKoZIhvcNAQENBQADggIBADMnxtSLiIunh/TQcjnRdf63yf2D8jMtYUm4yDoCF++J jCXbPQBGrpCEHztlNSGIkF3PH7ohKZvlqF4XePWxpY9dkr/pNyCF1PRkwxUURqvuHXbu8Lwn 8D3U2HeOEU3KmrfEo65DcbanJCMTTW7+mU9lZICPP7ZA9/zB+L0Gm1UNFZ6AU50N/86vjQfY WgkCd6dZD4rQ5y8L+d/lRbJW7ZGEQw1bSFVTRpkxxDTOwXH4/GpQfnfqTAtQuJ1CsKT12e+H NSD/RUWGTr289dA3P4nunBlz7qfvKamxPymHeBEUcuICKkL9/OZrnuYnGROFwcdvfjGE5iLB kjp/ttrY4aaVW5EsLASNgiRmA6mbgEAMlw3RwVx0sVelbiIAJg9Twzk4Ct6U9uBKiJ8S0sS2 8RCSyTmCRhJs0vvva5W9QUFGmp5kyFQEoSfBRJlbZfGX2ehI2Hi3U2/PMUm2ONuQG1E+a0AP u7I0NJc/Xil7rqR0gdbfkbWp0a+8dAvaM6J00aIcNo+HkcQkUgtfrw+C2Oyl3q8IjivGXZqT 5UdGUb2KujLjqjG91Dun3/RJ/qgQlotH7WkVBs7YJVTCxfkdN36rToPcnMYOI30FWa0Q06gn F6gUv9/mo6riv3A5bem/BdbgaJoPnWQD9D8wSyci9G4LKC+HQAMdLmGoeZfpJzKHMYIE0TCC BM0CAQEwgYAweTEQMA4GA1UEChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNl cnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcN AQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DANBglghkgBZQMEAgMFAKCCAiEwGAYJKoZI hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUxMTE3MTIzODQ1WjBPBgkq hkiG9w0BCQQxQgRAA8RxeX7hKcSJH4IyaFDKkmhERXu1y0/+HWzQ0na9zLOLEZT+lurzGaYc FDYsq42ijb241ktLc+wwVCSCJmVOsDBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxEt+DCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DAN BgkqhkiG9w0BAQEFAASCAgAm2nKu7yO7OH74YuDPTFfNp5Nj9iJ2zBK0umlAuzIxoKp5vYBX we0MsYoRl2EQtWzZUVR72+Gz2/fgvILcQG8TsE7ChKQUR8DQONPkdrXAhhR+qA+78rQ+UDBS gwZWHZDhfvuPlnT70rN1SHD4HfDiD86E7jJouQO33qut3GdE7uHfES2YyNVDE4bsdakTwqgv Q6rcHKL8/bvJ0vn+niLVqIhmoFmT8qmZkhzQXHjsRixlZDE8I34rswQDvrkV/h0/eTGncsDT gEVDK3E7IhDkeIrzpLFu31E4jDJig/7UKkiR+KzMhnXdj2T7wIUllA11oT78S70OoXNVpy1g /TOIBcEGesPXOpiiByIPqhg3IUEA9xOeAtnch5mPDG80fStG+cQE9Qt5t8lRRvTlrPR6gYQ9 ++m2lGqxAlDiJ9ziqY0FiHMZbMkV0LriDLbP7Ya+l7/l9Go0wSZzGNXMX+lI8Ey6TUgT9ka+ Yy5EJLZy4MnEpfp7A+IkZMlk9PggRVmZ5DqX63ANLfH2OrsNgTzwniP8xGuzU6CbMOOkY4+Q gHOSVswxWevSkXFHkZjkM3VouQnSlazd0eSilh0sLY8Lk2ajzMu9dMJlfvUcZNrNm1yDanAO MvLcv0crRLkH9hHE0/3bp5Bp5HHEpsxopbSdAakB53a7jqgcGrHfJLZJGwAAAAAAAA== --------------ms090408040208000609090605--