Date: Sun, 7 Apr 1996 00:10:56 +0200 (MET DST) From: aagero@aage.priv.no To: FreeBSD-gnats-submit@freebsd.org Subject: kern/1120: system panics after editing a disklabel Message-ID: <199604062210.AAA00933@birk04.studby.uio.no> Resent-Message-ID: <199604062220.OAA19732@freefall.freebsd.org>
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>Number: 1120
>Category: kern
>Synopsis: system panics when writing back the disklabel to the disk
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Apr 6 14:20:01 PST 1996
>Last-Modified:
>Originator: =C5ge R=F8bekk
>Organization:
=20
>Release: FreeBSD 2.2-CURRENT i386
>Environment:
=20
FreeBSD 2.2-CURRENT, kernel built of sources from april 4
>Description:
=20
$ gdb -k kernel /var/crash/vmcore.2=20
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.13 (i386-unknown-freebsd),=20
Copyright 1994 Free Software Foundation, Inc...
IdlePTD 20a000
current pcb at 1fddf4
panic: biodone: buffer not busy
#0 boot (howto=3D260) at ../../i386/i386/machdep.c:942
942 dumppcb.pcb_ptd =3D rcr3();
(kgdb) bt
#0 boot (howto=3D260) at ../../i386/i386/machdep.c:942
#1 0xf0116c46 in panic (fmt=3D0xf01b9a7c "page fault")
at ../../kern/subr_prf.c:133
#2 0xf01ba5d6 in trap_fatal (frame=3D0xf01e6ce0) at =
../../i386/i386/trap.c:740
#3 0xf01ba0c8 in trap_pfault (frame=3D0xf01e6ce0, usermode=3D0)
at ../../i386/i386/trap.c:651
#4 0xf01b9dab in trap (frame=3D{tf_es =3D 16, tf_ds =3D -255721456,=20
tf_edi =3D -255363456, tf_esi =3D 17, tf_ebp =3D -266441428,=20
tf_isp =3D -266441464, tf_ebx =3D 0, tf_edx =3D 80, tf_ecx =3D 0, =
tf_eax =3D 17,=20
tf_trapno =3D 12, tf_err =3D -266469376, tf_eip =3D -267311499,=20
tf_cs =3D 25624584, tf_eflags =3D 66118, tf_esp =3D -222174484,=20
tf_ss =3D -1073721280}) at ../../i386/i386/trap.c:319
#5 0xf01b2ce1 in calltrap ()
#6 0xf012af05 in getblk (vp=3D0xf0c77680, blkno=3D80, size=3D8192, =
slpflag=3D0,=20
slptimeo=3D0) at ../../kern/vfs_bio.c:982
#7 0xf0129c35 in bread (vp=3D0xf0c77680, blkno=3D80, size=3D8192, =
cred=3D0x0,=20
bpp=3D0xf01e6dc8) at ../../kern/vfs_bio.c:205
#8 0xf019a375 in ffs_update (ap=3D0xf01e6df4) at =
../../ufs/ffs/ffs_inode.c:137
#9 0xf019d934 in ffs_fsync (ap=3D0xf01e6e38) at ./vnode_if.h:1031
#10 0xf019c560 in ffs_sync (mp=3D0xf0c26000, waitfor=3D2, =
cred=3D0xf0ab6400,=20
p=3D0xf02046b4) at ./vnode_if.h:407
#11 0xf013082b in sync (p=3D0xf02046b4, uap=3D0x0, retval=3D0x0)
at ../../kern/vfs_syscalls.c:356
---Type <return> to continue, or q <return> to quit---
#12 0xf01b531d in boot (howto=3D256) at ../../i386/i386/machdep.c:891
#13 0xf0116c46 in panic (fmt=3D0xf012b875 "biodone: buffer not busy")
at ../../kern/subr_prf.c:133
#14 0xf012b9d9 in biodone (bp=3D0xf2c21230) at ../../kern/vfs_bio.c:1359
#15 0xf0192b58 in scsi_done (xs=3D0xf0ab6880) at ../../scsi/scsi_base.c:444
#16 0xf018ab1a in ncr_complete (np=3D0xf0c0e000, cp=3D0xf0c0ac00)
at ../../pci/ncr.c:4298
#17 0xf018ab65 in ncr_wakeup (np=3D0xf0c0e000, code=3D0) at =
../../pci/ncr.c:4340
#18 0xf018b68c in ncr_exception (np=3D0xf0c0e000) at ../../pci/ncr.c:4943
#19 0xf0189dfa in ncr_intr (vnp=3D0xf0c0e000) at ../../pci/ncr.c:3524
(kgdb) up 14
#14 0xf012b9d9 in biodone (bp=3D0xf2c21230) at ../../kern/vfs_bio.c:1359
1359 panic("biodone: buffer not busy");
(kgdb) list
1354 {
1355 int s;
1356
1357 s =3D splbio();
1358 if (!(bp->b_flags & B_BUSY))
1359 panic("biodone: buffer not busy");
1360
1361 if (bp->b_flags & B_DONE) {
1362 splx(s);
1363 printf("biodone: buffer already done\n");
The one thing I dont quite understand is the page fault-panic in frame 1.
Why another panic?
>How-To-Repeat:
=20
disklabel -e sd?
exit and save
>Fix:
=20
Not known.
>Audit-Trail:
>Unformatted:
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