Date: Thu, 17 Aug 2006 18:04:23 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Eric Anderson <anderson@centtech.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, pjd@freebsd.org Subject: Re: 6-STABLE snapshot (background fsck) lock-up Message-ID: <20060817150423.GA20768@deviant.kiev.zoral.com.ua> In-Reply-To: <44E482E8.50509@centtech.com> References: <44E45C3F.6060901@centtech.com> <20060817122502.GF1483@deviant.kiev.zoral.com.ua> <44E4614B.9000902@centtech.com> <44E482E8.50509@centtech.com>
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--HcAYCG3uE/tztfnV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 17, 2006 at 09:53:28AM -0500, Eric Anderson wrote: > On 08/17/06 07:30, Eric Anderson wrote: > >On 08/17/06 07:25, Kostik Belousov wrote: > >>On Thu, Aug 17, 2006 at 07:08:31AM -0500, Eric Anderson wrote: > >>>I've seen this several times now, but this time I got a dump.=20 > >>>Basically, the system comes up after unclean shutdown, throws a bunch = of=20 > >>>filesystems into the background fsck list, and begins 60 seconds later= .=20 > >>> After some amount of time, the system will lock up, presumably hung= =20 > >>>waiting on locks. > >>> > >>>Here's some info: > >>>lock type bufwait: EXCL (count 1) by thread 0xffffff0128812980 (pid 80= 4)=20 > >>>lock type getblk: EXCL (count 1) by thread 0xffffff0128812980 (pid=20 > >>>804)Locked vnodes > >>> > >>>0xffffff01c5c9f000: tag ufs, type VREG > >>> usecount 1, writecount 0, refcount 13656 mountedhere 0 > >>> flags (VV_SYSTEM) > >>> v_object 0xffffff01b09542a0 ref 0 pages 1691637 > >>> lock type snaplk: EXCL (count 1) by thread 0xffffff0128812980 (pi= d=20 > >>>804) > >>> ino 4, on dev label/vol4 > >>> > >>> > >>> > >>>How can I use kgdb to get more debugging information from this? > >>> > >>Look at the > >>http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/ke= rneldebug-deadlocks.html > >>for instructions for ddb. > >> > >>What is the date of the system checkout ? > > > > > >6-STABLE from ~8/12/06. > > > >So there's not much that can be done with the vmcore? > > > >I'll add the options to my kernel config (I was missing a few), and I=20 > >suppose wait for another deadlock. >=20 > Ok, had another one. Here are screenshots: >=20 > http://www.googlebit.com/freebsd/snapshots/ >=20 > Is it the sysctl that is triggering it? Hmm, unbelievable. It would be much simpler for you to set up serial console. Anyway, you use g_journal, and the problem seems to be related to some geom locking. pjd@ is the right person to contact. I added him to the Cc:. --HcAYCG3uE/tztfnV Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE5IV2C3+MBN1Mb4gRAg9dAKC+mhKmGK3nLzND+eALWzuEUtoxogCg97x2 r4saVVAdTfti3PjGlqyfZ1E= =E/Gr -----END PGP SIGNATURE----- --HcAYCG3uE/tztfnV--
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