Date: Sun, 16 Mar 2003 08:59:21 +0100 From: Morten Rodal <morten@rodal.no> To: Jeff Roberson <jroberson@chesapeake.net> Cc: Doug Barton <DougB@FreeBSD.ORG>, Attila Nagy <bra@fsn.hu>, freebsd-current@FreeBSD.ORG Subject: Re: kern/49079: panic: bwrite: buffer is not busy Message-ID: <20030316075920.GA5468@slurp.rodal.no> In-Reply-To: <20030316024543.V41845-100000@mail.chesapeake.net> References: <20030315220802.GA531@slurp.rodal.no> <20030316024543.V41845-100000@mail.chesapeake.net>
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On Sun, Mar 16, 2003 at 02:46:13AM -0500, Jeff Roberson wrote:
> On Sat, 15 Mar 2003, Morten Rodal wrote:
>=20
> > On Fri, Mar 14, 2003 at 06:47:27PM +0100, Morten Rodal wrote:
> > [snip the parent post]
> >
> > I just got another one of these. This time it didn't double panic
> > while syncing the disks. I've been getting this quite often now,
> > almost daily. If there is anything else I can help you with to get to
> > the bottom of this problem don't hesitate to ask.
> >
> > Attached is a the gdb output and the backtrace from DDB.
>=20
> Excelent, can you open up the kernel in gdb again. Then do the following:
>=20
> frame 3
> print bp
>=20
> With this information I should be able to find the problem.
>=20
--=20
Morten Rodal
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Script started on Sun Mar 16 08:57:26 2003
slurp# gdb -k kernel.3 vmcore.3
GNU gdb 5.2.1 (FreeBSD)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-undermydesk-freebsd"...
panic: bwrite: buffer is not busy???
panic messages:
---
panic: bwrite: buffer is not busy???
cpuid =3D 1; lapic.id =3D 00000000
Stack backtrace:
boot() called on cpu#1
syncing disks, buffers remaining... 3452 3452 3451 3451 3449 3448 3448 3448=
3448 3448 3448 3448 3448 3448 3448 3448 3448 3448 3448 3448 3448 3448 3448=
3448 3448=20
giving up on 110 buffers
Uptime: 48m16s
Dumping 447 MB
[CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CT=
RL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-=
C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C t=
o abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to a=
bort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abor=
t] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] =
[CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CT=
RL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-=
C to abort] [CTRL-C to abort] [CTRL-C to abort] 16[CTRL-C to abort] [CTRL-=
C to abort] [CTRL-C to abort] [CTRL-C to abort] 32[CTRL-C to abort] [CTRL-=
C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C t=
o abort] 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 3=
20 336 352 368 384 400 416 432
---
#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:239
239 dumping++;
(kgdb) frame 3
#3 0xc02194e2 in bwrite (bp=3D0xcc9a5fe8) at /usr/src/sys/kern/vfs_bio.c:8=
02
802 panic("bwrite: need chained iodone");
(kgdb) print bp
$1 =3D (struct buf *) 0xcc9a5fe8
(kgdb) print *bp
$2 =3D {b_io =3D {bio_cmd =3D 2, bio_dev =3D 0xffffffff, bio_disk =3D 0x0,=
=20
bio_blkno =3D 4188480, bio_offset =3D 2145681408, bio_bcount =3D 16384,=
=20
bio_data =3D 0xd219e000 "", bio_flags =3D 0, bio_error =3D 0, bio_resid=
=3D 0,=20
bio_done =3D 0xc021d1f0 <bufdonebio>, bio_driver1 =3D 0x0, bio_driver2 =
=3D 0x0,=20
bio_caller1 =3D 0xc39c9400, bio_caller2 =3D 0xcc9a5fe8, bio_queue =3D {
tqe_next =3D 0x0, tqe_prev =3D 0xc39c940c}, bio_attribute =3D 0x0,=20
bio_from =3D 0x0, bio_to =3D 0x0, bio_length =3D 0, bio_completed =3D 0=
,=20
bio_children =3D 1398, bio_inbed =3D 0, bio_parent =3D 0x0, bio_t0 =3D =
{sec =3D 0,=20
frac =3D 0}, bio_task =3D 0, bio_task_arg =3D 0x0, bio_pblkno =3D 518=
876},=20
b_op =3D 0xc036e018, b_magic =3D 280038160,=20
b_iodone =3D 0xc0221300 <cluster_callback>, b_offset =3D 262144, b_vnbufs=
=3D {
tqe_next =3D 0x0, tqe_prev =3D 0x0}, b_left =3D 0x0, b_right =3D 0x0,=
=20
b_vflags =3D 0, b_freelist =3D {tqe_next =3D 0xcc9a5908, tqe_prev =3D 0xc=
03a145c},=20
b_qindex =3D 0, b_flags =3D 1677721604, b_xflags =3D 0 '\0', b_lock =3D {
lk_interlock =3D 0xc039b7a4, lk_flags =3D 0, lk_sharecount =3D 0,=20
lk_waitcount =3D 0, lk_exclusivecount =3D 0, lk_prio =3D 80,=20
lk_wmesg =3D 0xc034482b "bufwait", lk_timo =3D 0, lk_lockholder =3D 0xf=
fffffff,=20
lk_newlock =3D 0x0}, b_bufsize =3D 16384, b_runningbufspace =3D 0,=20
b_kvabase =3D 0xd219e000 "", b_kvasize =3D 16384, b_lblkno =3D 16,=20
b_vp =3D 0xc41b1a44, b_object =3D 0x0, b_dirtyoff =3D 0, b_dirtyend =3D 1=
6384,=20
b_rcred =3D 0x0, b_wcred =3D 0x0, b_saveaddr =3D 0xd219e000, b_pager =3D {
pg_spc =3D 0x0, pg_reqpage =3D 0}, b_cluster =3D {cluster_head =3D {
tqh_first =3D 0xccab02f8, tqh_last =3D 0xccab0420}, cluster_entry =3D=
{
tqe_next =3D 0xccab02f8, tqe_prev =3D 0xccab0420}}, b_pages =3D {0xc0=
f97d08,=20
0xc0f80c50, 0xc0f92398, 0xc0e9cfe0, 0xc0eefc48, 0xc0efd490, 0xc0a8a3d8,=
=20
0xc0f04120, 0xc0a85c68, 0xc0a853b0, 0xc0a3c1f8, 0xc0f1a140, 0xc0de4288,=
=20
0xc0f468d0, 0xc0ac3c18, 0xc0a61e60, 0xc0a4fea8, 0xc0f175f0, 0xc0de5638,=
=20
0xc0dee680, 0xc0ddeac8, 0xc0f07210, 0xc0a9fe58, 0xc0f462a0, 0xc0dd40e8,=
=20
0xc0f3a630, 0xc0ef4178, 0xc0f3dcc0, 0xc0de6b08, 0xc0f3b050, 0xc0f17998,=
=20
0xc0dd81e0}, b_npages =3D 4, b_dep =3D {lh_first =3D 0x0}}
(kgdb) slurp# ^Dexit
Script done on Sun Mar 16 08:57:55 2003
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