Date: Thu, 10 Jan 2013 14:25:48 -0800 From: Xin Li <delphij@delphij.net> To: d@delphij.net Cc: Brandon Gooch <jamesbrandongooch@gmail.com>, Konstantin Belousov <kostikbel@gmail.com>, freebsd-current@freebsd.org Subject: Re: sysctl -a causes kernel trap 12 Message-ID: <50EF3FEC.60605@delphij.net> In-Reply-To: <50EB870D.3020306@delphij.net> References: <50EB602F.9050300@delphij.net> <20130108000233.GZ82219@kib.kiev.ua> <50EB63A9.50903@delphij.net> <CALBk6yK_%2BpcSA_Rgioe-2ed8KujpDK79GMG8jX3GMeqGV8ifrA@mail.gmail.com> <50EB870D.3020306@delphij.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 To all: this became more and more hard to replicate lately. I've tried these options and the most important progress is that it's possible to get a crashdump when debug.debugger_on_panic=0 and I managed to get a backtrace which indicates the panic occur when trying to do mtx_lock(&Giant) -> __mtx_lock_sleep -> turnstile_wait -> propagate_priority, but after I've added some instruments to the surrounding code and enabled INVARIANT and/or WITNESS, it mysteriously went away. Reverting my instruments code and update to latest svn makes the issue disappear for one day. I've hit it again today but unfortunately didn't get a successful dump and after reboot I can't reproduce it again :( Still trying... Cheers, - -- Xin LI <delphij@delphij.net> https://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJQ7z/sAAoJEG80Jeu8UPuzJbMIAL2xM6xWATXp2swY1E25WaCj UoDAJtVkGvI5pOQmt7UBvDJfqr74/1c1ugGodFVAtRluKihxQ6amXcmF62eqPu0g ARj7R+g/5qQ+QDDOVFcqnvuz1A1KwoDD5jkfAyq+oWECQ5a4ROk/59EhlriK9CQd I4NRzuJLgOf3t4xNk7nAEYSnx+zL07vpGmSNIHdWkLieGNIoa1X5W9HtfpOGgRpm c5ELbWTpxGTtAFmFxc7h2hygu38/hlj6KPJHRK6HGcR1t/EMc2Rauzn7Bl3R3C/W TjDrxknPjZUUA70oI2V2Vo8tGZaJCzpq8dDWb8fx5rbKxLM+svmShHYftow78rM= =ooDY -----END PGP SIGNATURE-----
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