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Date:      Thu, 29 Nov 2007 11:59:51 -0600
From:      Josh Paetzel <josh@tcbug.org>
To:        freebsd-fs@freebsd.org
Subject:   Strange filesystem related console output
Message-ID:  <200711291159.59742.josh@tcbug.org>

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# uname -a
=46reeBSD services.tcbug.org 6.2-STABLE FreeBSD 6.2-STABLE #0: Wed Oct 17=20
18:54:12 UTC 2007     root@services.tcbug.org:/usr/obj/usr/src/sys/SERVICES=
 =20
amd64

Yesterday, after many moons of reliable service I awoke to find this box ha=
d=20
spontaniously rebooted during the night.  It's a core2quad that doesn't do=
=20
any one particular thing, but by virtue of all the stuff running on it it=20
stays pretty busy....half dozen jails, mailserver, webserver, pgsql, mysql,=
=20
occassional build machine so on and so forth.  When I tried to build a=20
package with it it rebooted again about 30 seconds in to the compile....I=20
checked cpu temps, booted a live cd with the hard drive diagnostics, ran=20
memtest....hardware looks fine, which doesn't mean much of course.

Anyways, I brought the box back up, and it immediately goes in to bg_fsck +=
=20
gmirror rebuild contention....I try building a package again, and it=20
immediately reboots.

So I boot it in single user, set the bgfsck_delay to 12 hours and then brin=
g=20
it back up multiuser.  It starts syncing the gmirror, I build my packages,=
=20
box works fine the rest of the day.....about 12 hours later the fsck starts=
,=20
and about 20 minutes in to it I get this spammed to the console....

fsync: giving up on dirty
0xffffff00614975d0: tag devfs, type VCHR
  usecount 1, writecount 0, refcount 1755 mountedhere 0xffffff0005f4c000
  flags ()
  v_object 0xffffff00618541c0 ref 0 pages 42464
  lock type devfs: EXCL (count 1) by thread 0xffffff004facb720 (pid 77517)
      dev mirror/gm0s1f

I kept waiting for a panic or another reboot, but it never came.....today t=
he=20
box appears to be back in action.

I can't help but think this console message is somehow related to the reboo=
ts,=20
but no idea what really happened here.

Any insight apprectiated.....more diagnostic info is always available upon=
=20
request.

=2D-=20
Thanks,

Josh Paetzel

PGP: 8A48 EF36 5E9F 4EDA 5A8C 11B4 26F9 01F1 27AF AECB

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