Date: Fri, 26 Aug 2011 00:53:49 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Charlie Martin <crmartin@sgi.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Where to ask about a 7.2 bug, and debugging sys/queue.h errors Message-ID: <20110825215348.GW17489@deviant.kiev.zoral.com.ua> In-Reply-To: <4E56BB99.6030706@sgi.com> References: <4E56BB99.6030706@sgi.com>
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--QWHkWXETW2F1vgkC Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 25, 2011 at 03:16:09PM -0600, Charlie Martin wrote: > We're having a crash in some internal code running on FreeBSD 7.2=20 > (specifically 7.2-PRERELEASE FreeBSD 7.2-PRERELEASE and yeah, I know=20 > it's quite a bit behind) in which after 18-30 hours of running load=20 > tests, the code panics with: >=20 > panic: Bad link elm 0xffffff0044c09600 next->prev !=3D elm > cpuid =3D 0 > KDB: stack backtrace: > db_trace_self_wrapper() at 0xffffffff8019119a =3D db_trace_self_wrapper+0= x2a > panic() at 0xffffffff80307c72 =3D panic+0x182 > devfs_populate_loop() at 0xffffffff802a43a8 =3D devfs_populate_loop+0x548 >=20 >=20 > First question: where's the most appropriate place to ask about this=20 > kind of bug on a back version. It is fine to ask there. >=20 > Second: does this remind anyone of any bugs? Googling came up with a=20 > few somewhat similar things but hasn't provided much insight so far. In 99% of the cases, it means that you forgot to dev_ref() some cdev. --QWHkWXETW2F1vgkC Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk5WxGwACgkQC3+MBN1Mb4iOvgCg5v6t/Xmr7axl/G6cCBPFTD9k IzgAoKbFdo3Nj5cNcJP9XnX/wnQTbnNW =1nG/ -----END PGP SIGNATURE----- --QWHkWXETW2F1vgkC--
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