From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f172.google.com ([209.85.213.172]:33790 "EHLO mail-ig0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752683AbbLJMb4 (ORCPT ); Thu, 10 Dec 2015 07:31:56 -0500 Received: by mail-ig0-f172.google.com with SMTP id mv3so16507796igc.0 for ; Thu, 10 Dec 2015 04:31:55 -0800 (PST) Subject: Re: subvols and parents - how? To: Duncan <1i5t5.duncan@cox.net>, linux-btrfs@vger.kernel.org References: <1448340960.14125.51.camel@scientia.net> <1448400350.21291.88.camel@scientia.net> <1449635797.20578.0.camel@scientia.net> <56687B26.7070300@gmail.com> From: Austin S Hemmelgarn Message-ID: <566970B8.7030700@gmail.com> Date: Thu, 10 Dec 2015 07:31:52 -0500 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms020005070303060102080102" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms020005070303060102080102 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 2015-12-09 22:56, Duncan wrote: > Austin S Hemmelgarn posted on Wed, 09 Dec 2015 14:04:06 -0500 as > excerpted: >=20 >> Agreed. It's not too bad fixing a Gentoo system (as long as >> /var/lib/portage/world is still correct, you can just nuke the install= ed >> package database and emerge world, it'll take time, but it will get yo= ur >> system in a guaranteed consistent state). >=20 > For sufficiently loose values of "consistent", yes, as I found out by=20 > experience. But it can be done, and I do have the experience to prove = it. >=20 > What happens in practice is that while yes, as long as @world is correc= t=20 > you can install to current and have all those files tracked again as=20 > appropriate, if your package installation database is missing or out of= =20 > sync with what's actually on your filesystem(s), where the new version = of=20 > various packages will replace older files as they come across them duri= ng=20 > the install process (subject to CONFIG_PROTECT of course, this part isn= 't=20 > the problem), the problem is actually where the files of the actually=20 > installed but untracked version differ from those of the version you're= =20 > installing. Oh, definately, it's a useable system short term, but not something you should be depending on. The other big difference though is that it's then trivial to bootstrap a clean install on the same system if you have the space for it (which is what I usually end up doing). --------------ms020005070303060102080102 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 hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUxMjEwMTIzMTUyWjBPBgkq hkiG9w0BCQQxQgRAg2qKUkSaVW2r/wtHS+JP2XPmjDhqj6ZVBZD/4KNApvVh8k3lGnFUfkji jOyJwp9oIaWWObwTgyMsspknv7nylzBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxEt+DCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DAN BgkqhkiG9w0BAQEFAASCAgBUrvBJTNlGIeOn8OR6iQBIQr+wDcIRoaBJzhuCHP6yBmAzinFC yqWpaqS4ytHG6OBPmIzlpSfHKE0AZzcTqssfvSB1LHxirah2+SKY6K58Mcl8m//Pm+7C0RNR P+GsczcLYfhjp9F3CiIbyAeDg09fkDAovgJNStuGmMgHp6FecuGg9uK6+Np09GxdDbeK97/e Q3cEihy5WTmIQ3DCQ0Svh9BnNAoGFLmpLheN5/9j8gQbnBw3N0R7xUsqfmb+6Wd90hEXSp37 ljecpy+dmhAYIQTb15yYAiGPjriLEz0nFWkpD4UdWDSXEjYH+g+ixRf+jzkGthquKXWaOJbS hEZpp0fPX61U97V9iu4O08/zqkxw2+TMEHOnLS2uue9W9mKxZ3hy/UqfVBQzVQwSAg3kduTC lg47yPkNP36AdgPjGA3It34a1GL4Aygbft2eXg0dfCDNFin9+znY5fXNxh9gb6BCCst77Ot/ nfzFjuZfautHXhnoZJ8MjQ0+AFp801MVeD1+twxPZEzQbb9EODcpsKf+4y94OF4tPzy8rox1 jG/4srNLc2ocWHNiWTTxbQ7ngUush7bWNbYXyWVR9fWjrqyuUCFWR5DVSGKSAw67a2RpAE1O 5PQEUbYUjFAjFEjjqVPy7SA+yVxgGSqHPf9Vku7ZpVH2jfFKBQTTnsuYNwAAAAAAAA== --------------ms020005070303060102080102--