Date: Wed, 18 Feb 2004 11:10:32 +0100 From: Andreas Kohn <andreas.kohn@gmx.net> To: current@FreeBSD.org Subject: [PANIC] page fault -> bremfree: removing a buffer not on a queue Message-ID: <1077099032.1231.12.camel@klamath.syndrom23.de>
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Hello,
yesterday my computer crashed with this panic:
panic: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address =3D 0x54
fault code =3D supervisor read, page not present
instruction pointer =3D 0x8:0xc04fe5b4
stack pointer =3D 0x10:0xcdb0d960
frame pointer =3D 0x10:0xcdb0d96c
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D 35 (swi3: cambio)
trap number =3D 12
panic: page fault
at line 819 in file /usr/src/sys/i386/i386/trap.c
syncing disks, buffers remaining... panic: bremfree: removing a buffer
not on a queue
at line 647 in file /usr/src/sys/kern/vfs_bio.c
---
FreeBSD xxxxxx 5.2-CURRENT FreeBSD 5.2-CURRENT #36: Fri Feb 13 20:17:22
CET 2004 root@xxxxxx:/usr/obj/usr/src/sys/KLAMATH i386
Before the panic happened, I was compiling/linking some software, and
watching TV (bttv/xawtv). The linking process gave some strange error
messages when linking to libGLcore.so (Nvidia drivers), which I can't
remember. I think it complained that that library wasn't valid, but
those messages repeated to fast to read & remember.
After rebooting, my /bin, /lib, and $HOME where lost ($HOME landed in
lost+found, I'm still sorting the files :D). I could restory /bin & /lib
with the help of /rescue and the contents of /usr/obj.=20
I do have a crash dump available, so if you need more information I'd be
glad to provide it.
--
(kgdb) where
#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:240
#1 0xc0507e3a in boot (howto=3D260) at
/usr/src/sys/kern/kern_shutdown.c:374
#2 0xc0508115 in __panic () at /usr/src/sys/kern/kern_shutdown.c:552
#3 0xc0544795 in bremfreel (bp=3D0xc7c89318) at
/usr/src/sys/kern/vfs_bio.c:647
#4 0xc05446b8 in bremfree (bp=3D0xc7c89318) at
/usr/src/sys/kern/vfs_bio.c:629
#5 0xc0548268 in getblk (vp=3D0xc2d51a28, blkno=3D23710912, size=3D16384,
slpflag=3D0, slptimeo=3D0, flags=3D0) at /usr/src/sys/kern/vfs_bio.c:2466
#6 0xc0544819 in breadn (vp=3D0xc2d51a28, blkno=3D23710912, size=3D16384,
rablkno=3D0x0, rabsize=3D0x0, cnt=3D0, cred=3D0x0, bpp=3D0x0)
at /usr/src/sys/kern/vfs_bio.c:700
#7 0xc05447e4 in bread (vp=3D0xc2d51a28, blkno=3D23710912, size=3D16384,
cred=3D0x0, bpp=3D0xd2973c04) at /usr/src/sys/kern/vfs_bio.c:682
#8 0xc05e5915 in ffs_update (vp=3D0xc30f8000, waitfor=3D0) at
/usr/src/sys/ufs/ffs/ffs_inode.c:108
#9 0xc05f8511 in ffs_fsync (ap=3D0xd2973c70) at
/usr/src/sys/ufs/ffs/ffs_vnops.c:325
#10 0xc05f76e7 in ffs_sync (mp=3D0xc2cb4c00, waitfor=3D3, cred=3D0xc14eae80=
,
td=3D0xc2cc4000) at vnode_if.h:627
#11 0xc0558562 in sync_fsync (ap=3D0xd2973ce4) at
/usr/src/sys/kern/vfs_subr.c:3355
#12 0xc055544d in sched_sync () at vnode_if.h:627
#13 0xc04f5fdd in fork_exit (callout=3D0xc05551e8 <sched_sync>, arg=3D0x0,
frame=3D0xd2973d48) at /usr/src/sys/kern/kern_fork.c:802
--
Regards,
Andreas Kohn
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