-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/21/2014 5:53 AM, Bjoern A. Zeeb wrote: > > On 21 Nov 2014, at 06:10 , Shawn Webb <lattera_at_gmail.com> wrote: > >> Looks like I’m getting a kernel panic on heavy work loads (poudriere run with 10 build slaves on an Intel Core i7 box). Below is a link to an imgur album of screenshots I took with my phone. >> >> I can reproduce this quite easily simply by spinning up a new poudriere run. Should I file a bug report or is reporting here all that’s needed? >> >> Link to screenshots: http://imgur.com/a/h64uB > > > Which exact revision/version of FreeBSD is this (SVN revision in case of non-release)? I'm at r274745. The code in question was written in 2003. I've narrowed down the behavior to OpenVPN with IPv6 causing this kernel panic. My OpenVPN server dishes out IPv6 as well as IPv4 in routing mode and is configured to use UDP (which is the default). OpenVPN's default keepalive is 120 seconds. If the tunnel goes down within that 120 seconds and OpenVPN doesn't notice, the tun device is still active but packages are simply queued rather then delivered. Eventually OpenVPN re-establishes the tunnel while keeping the tun device open, reusing it rather than destroying/recreating it. The kernel panic is happening either while the tunnel is down (yet tun device still is open) or when the tunnel is being brought back up. If I set the keepalive to a really small value (I currently have it at two seconds), then the kernel panic doesn't happen. Really interesting behavior. Thanks, Shawn -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJUb0svAAoJEGqEZY9SRW7uXAsP/AzM3wfkDUQrBXtm2M3UdhLc Y0EI+eqj58wIQ3UvwuRTLKg6T+Zpz5+yTBIzysPGCtgoR9UzYePVkqLyE2qD0bHT FSPDpOKGzhZBOdElsTGZziw/tHK+jL/JIqVLS98T8uUpzb6YHJWMD6uT9ZjLkS3+ tvIoyL1R7BtVhpnu73HCH4aGrshEgn9Tmtq3FSczAOMysYwtGc0oVFiSXpPy0wBg n2zW56jIHOFl/h6NkGD6HYFaDainkSf4yH+BbyMT82OiGSxOW2boz6IdGiopf5qI lTEpbdUQQ0R0YhMIaDNwawC7VhsGFSAe8kkrs/ma8Ut/X2D1yGhhpD2tTnYUMf0l g3sn2K27WHldGqK/YQ1KUDk1vqnynB7aTqfD7lTx2h//kYZbhVdLUiTS1VwzOuZU Qgz4Y/SJycx/qE19OnZ7L41XtyIICNpqYkI1HoFZBPqNePn6j2oZ9sUp92Rmui6S wvYZ0WP3FYZVsPUiFrZfKFb/RJ7woMyklBiRs09D4V5oO3Fxk3uxbQE5sSnr1mhn cN0izfazAXePMcSE3zMgARv+M/GT2LgySlurOb+7xAs47YecN2IT33m+Ffd+rF7X /jEaGMHGObZtQCl20GGPDcfy/KQrwHN8BdGJ81+T61NYfN+F1MImWve3YdzEOF1N Y6jill9bzaksguJ5WYev =AiXD -----END PGP SIGNATURE-----Received on Fri Nov 21 2014 - 13:24:50 UTC
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