From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f172.google.com ([209.85.213.172]:33866 "EHLO mail-ig0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751560AbbLDNxp (ORCPT ); Fri, 4 Dec 2015 08:53:45 -0500 Received: by igvg19 with SMTP id g19so36120020igv.1 for ; Fri, 04 Dec 2015 05:53:44 -0800 (PST) Subject: Re: 3.16.0 Debian kernel hang To: Russell Coker References: <201512042100.58127.russell@coker.com.au> <5661906A.50309@gmail.com> <201512050042.32497.russell@coker.com.au> Cc: linux-btrfs@vger.kernel.org From: Austin S Hemmelgarn Message-ID: <56619AC3.5000309@gmail.com> Date: Fri, 4 Dec 2015 08:53:07 -0500 MIME-Version: 1.0 In-Reply-To: <201512050042.32497.russell@coker.com.au> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms050709090804010800010307" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms050709090804010800010307 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-12-04 08:42, Russell Coker wrote: > On Sat, 5 Dec 2015 12:08:58 AM Austin S Hemmelgarn wrote: >>> I know that there are no plans to backport things to 3.16 and I don't= >>> think the Debian people are going to be very interested in this. So >>> this message is a FYI for users, maybe consider not using the >>> Debian/Jessie kernel for BTRFS systems. >> >> I'd suggest extending that suggestion to: >> If you're not using an Enterprise distro (RHEL, SLES, CentOS, OEL), th= en >> you should probably be building your own kernel, ideally using upstrea= m >> sources. > > There are lots of ways of dealing with this. > > Debian development doesn't stop. Anyone who is running a Jessie system= can > easily run a kernel from Testing or Unstable (which really isn't partic= ularly > unstable). It's generally expected that Debian user-space will work wi= th a > kernel from +- one release of Debian. Also every time I've tried it De= bian > has worked well with a CentOS kernel of a similar version. Well yes, that does usually work, but that doesn't mean that it keeps up = with mainline very well. Back when I used Debian on a regular basis, I=20 ran the 'unstable' kernels, and they still lagged behind mainline by at=20 least a minor version, and often more than that. And there have been=20 cases where things got horribly broken in mainline due to lack of proper = vetting of code (Most recent example being the insanity with the=20 clustered MD code, which broke non-clustered soft raid for at least two=20 major releases), which prevents them from safely keeping up-to-date with = mainline. > > The only reason I'm not running Unstable kernels on my Debian systems i= s > because I run some Xen servers and upgrading Xen is problemmatic. Lino= de is > moving from Xen to KVM so I guess I should consider doing the same. If= I > migrate my Xen servers to KVM I can use newer kernels with less risk. That's interesting, that must be something with how they do kernel=20 development in Debian, because I've never had any issues upgrading=20 either Xen or Linux on any of the systems I've run Xen on, and I=20 directly track mainline (with a small number of patches) for Linux, and=20 stay relatively close to mainline with Xen (Gentoo doesn't have all that = many patches on top of the regular release for Xen, aside from XSA patche= s). --------------ms050709090804010800010307 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 hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUxMjA0MTM1MzA3WjBPBgkq hkiG9w0BCQQxQgRAIs0ULz9fc9Ia3VvUIDv4e69kcOQLtqAwmZCO2KIZSUjScEdIuVph+LXN cO9K1ge4UmxzOhJ0xq7Lr9rqemIjszBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxEt+DCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DAN BgkqhkiG9w0BAQEFAASCAgAhZNH/56YjX+yQEYOYe/vw7aIWEJGedXrrV5Pm199ZGKIWtFlp +GYlOS7sNx6i8dtrBwzVR8bVFidawxVwIJIJJ7rttiy5hAlr2kZJnYUXV3ZgGShd6yAaGpAU HzZWcasmqdq7ygtzh3abHDJp6ybYunX/V4fv9gKGygZYfeAAp1FtksykaogAEfy6+9yUZ5eV zEDoy2eEcBmAmKGjPhjxbXoe5d46oEU/XqChvsJXH3oxcAXEQQkohazG7ltAGBaLuito1ntp bf6lyexYxN+vsk7RX2XRrUdX33uOqYHN/SeykQel+oh0yBIruMD+u96qRkjxougz79rewF3A DtwAFR7/aRHorBMMx8WnYCNqHxMBS7jYYlEZ/V+257I545TRkN3LA1cNkCSkhmeN87x0Qyto AOVmnzZOMeaqS4u6zF92/WO5UQAUX53t8EpYvVLyMwa3ecOsX8XTdKsKS0VaSkWUufh7oueK D8wteBsqLvvznCWy6l1GEwcB6VEqRPSvExJRaEvKY4qemU7bVwpsSGiLJagQOm+Trn4aFjcp 0R+CuMHPZhCo/cpf265JVUjp46O/VO7KHBDAQSeVnl/+8fh7YtHZ67kap6ZVP4ke8jrc/QoO j0rJCNVANRArnd4qZDQGm3X7nZPkHfxGX9jjzHtsxBzdridWnidugCg2EwAAAAAAAA== --------------ms050709090804010800010307--