From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f170.google.com ([209.85.223.170]:33447 "EHLO mail-io0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751738AbbHYR7m (ORCPT ); Tue, 25 Aug 2015 13:59:42 -0400 Received: by iods203 with SMTP id s203so196479761iod.0 for ; Tue, 25 Aug 2015 10:59:41 -0700 (PDT) Subject: Re: Response to Bcachefs Claims To: Chris Murphy , Btrfs BTRFS References: <1440516154.040713246@apps.rackspace.com> From: Austin S Hemmelgarn Message-ID: <55DCAD07.1020500@gmail.com> Date: Tue, 25 Aug 2015 13:59:35 -0400 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms000808070603060805060602" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms000808070603060805060602 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-08-25 12:39, Chris Murphy wrote: > On Tue, Aug 25, 2015 at 9:22 AM, Vincent Olivier wrot= e: > >> For my own sake and other's I would like to maintain (if nobody is alr= eady working on that nor needs any help) a centralized human-readable dig= est of known issues that would be featured prominently on top of the Btrf= s wiki. I would merge the Gotchas page and the various known issues pages= (including the various multi-device mount gotchas here and there). > > Some way to organize problems by distribution would be needed to be com= plete. > > For example I don't have the discover & mount by label or uuid problem > you mention on Fedora, since forever. I haven't experienced it on > Fedora 19/20 which is approximately what CentOS 7 is based on. To > figure that out means using one or more boot parameters: > systemd.log_level=3Ddebug or rd.udev.debug or rd.debug to find out > what's happening. That would be because the Fedora initrd does a device scan before trying = to mount root. Most of the big distro's do this now, but of course you=20 need to be using an initrd for it to work. > The one problem case I still have with the latest versions is multiple > device Btrfs volume UUID doesn't exist when 1 or more devices are > missing. I've seen this myself, but only sometimes. Based on my own testing, it=20 only seems to happen when one of the disks with a system chunk on it is=20 missing (for example, in a 3 device raid1 setup, one of the disks won't=20 have a system chunk on it, and if disk goes missing, I can still mount=20 by UUID fine). --------------ms000808070603060805060602 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 Brgwgga0MIIEnKADAgECAgMQblUwDQYJKoZIhvcNAQENBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTUwMzI1MTkzNDM4WhcNMTUwOTIxMTkzNDM4WjBjMRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz 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 b20wDQYJKoZIhvcNAQENBQADggIBABr5e8W+NiTER+Q/7wiA2LxWN3UdhT3eZJjqqSlP370P KL5iWqeTfxQ67Ai/mHbJcT2PgAJ+/D2Ji+aRR03UWnU/vtOwzyDLUMstqnfl0Zs+sz/CJe7x nBA5jlpjC2DKuMVfbPze7eySaen7XSGFHKE1QoVIIpQ2kVjC4nbbJQnUbAVX1Iz29WxeVGt9 XYigz3tDPf3tglN+q23E7YjQl4abTIoM7i98yV1H9gfY8lFfKZ6jREB9+n6ie2EwS3Kat2mG tl2wBx4MfRnoSQSKsLKQ5oTwhWf0JqlFwpLfl374p0Njcykej9/jnWG8Ks1V/AXTHqI4eyIP Mf5yMZkPv7n7LS9WWKdG4Nd38iv4T2EiAaWsmgu+r81qL5CJu9AyA0SBS4ttKf6k3e63w2Mv N9R45vpQ3QhAhfWyFxFhZN95APe3YECDG3+XIRJpRYPEtHuIsOyzI70ajF93gg/BidvqKsmV MM2ccktDMfqwZXea6zey7F8Geu9R7BqjXmG2HlNuXu7e/xnHOgXf5D3wPmnRLlBhXL1Ch97a w2KjaupjpAHfFjv5kGnZXN87UvvlwzIZiKXwa3vTDwK+rrKn/sHPkfDZPSiyt/ZBIK6lX83P 34H/CzGg+Kx57rHYOIHGumIvpDa5vfWp8O0sGgawb1C2Aae4sTUVIWmIjVuGI062MYIE0TCC BM0CAQEwgYAweTEQMA4GA1UEChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNl cnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcN AQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxBuVTANBglghkgBZQMEAgMFAKCCAiEwGAYJKoZI hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUwODI1MTc1OTM1WjBPBgkq hkiG9w0BCQQxQgRA10T/oZKS+RS2jnAbPuAVyMRV890CVzq4bmpA1soOR2mV0A3tfS0hABOz KDP6fbU6XUh4B3Qrf6fvgS2r8tB26DBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxBuVTCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxBuVTAN BgkqhkiG9w0BAQEFAASCAgAFmOS9dEVWYNEqoTF/qX69yp1D9FNu6sEXJxjh1JoH4I9Nt4sj jbnGT8Lwvuyff5JAmC2c5w+cFoSv5PU6MRCHebZ4eNR1X0Vo8oRD2j1n1DnMchChlfysMnwI ha0k4mQDVCOQnw5ssnFZiRBy9kJI+IjRgBki/9rJgn8jZ8CgV1a0Ew353P5cF7r9r/ALQ+Xk xQD9BOQxyRUbLHziWV3FYHmrqA6sopXHQguDUJTZm9hZ9cz299e7l25FuvM67X3fVcYqKCr6 PIG6YXXhxUGegYUUiDsSy4CnKi7247ysQXCVr02HiU25DUKPdrvW+aaJ51IcRlZfsOoaPrTF B8RxFfdVdgXmZQdP7As4+KQQPRFDWeziPnGcB2m+HA85ztSpZYxsnJT1+C65xaV739Yw01dn VawiboJHT+/v5hRHWPpCrHo7WDPXI4A8h/s+/2fi1/EFcCUdJ7G7DNiDeGHx9xPhiyCtnyDA Z9t03jqHKx1ru5gxtqols+RE3y4xK/t+qTPAILYtsMCXHBgLZn2L52cMBtEWziav6RlkNF0y 14LG90KwH4SwtAC1VuRo1C+8OzvXueckJMSvvvieaDQOBeFOgyuOUrNcz2AlA4Eh5w4OYx6E 0rFxeaVXrzpBHbTVhEZtSmJh460QXCvtb70IHYdKm+eHmlteScBXuP63OQAAAAAAAA== --------------ms000808070603060805060602--