Date: Tue, 13 May 2003 15:44:20 -0400 From: "Kevin A. Pieckiel" <kpieckiel-freebsd-hackers@smartrafficenter.org> To: freebsd-hackers@freebsd.org Subject: Kernel Panic Message-ID: <20030513194420.GB87968@pacer.dmz.smartrafficenter.org>
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If anyone is interested, I received this on a testbed computer. It was
sitting idle at the time--I haven't used it in the past couple of weeks.
I just noticed this today when I went back to play with it.
Can provide kernel config, core file, and debug kernel via ftp or http upon=
request.
System is:
-su-2.05b# uname -a
FreeBSD viper.smartrafficenter.net 5.0-CURRENT FreeBSD 5.0-CURRENT #0: Fri =
Apr 11 00:33:43 EDT 2003 toor@viper.smartrafficenter.net:/usr/obj/usr/s=
rc/sys/VIPER i386
Dump info from gdb is:
panic: vdrop: holdcnt
panic messages:
---
panic: vdrop: holdcnt
cpuid =3D 0; lapic.id =3D 00000000
boot() called on cpu#0
syncing disks, buffers remaining... 1316 1316 1316 1316 1316 1316 1316 1316=
1316 1316 1316 1316 1316 1316 1316 1316 1316 1316 1316 1316=20
giving up on 1315 buffers
Uptime: 19h50m25s
Dumping 112 MB
ata0: resetting devices ..
done
16 32 48 64 80 96
---
#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:239
239 dumping++;
(kgdb) bt
#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:239
#1 0xc01c20e8 in boot (howto=3D256) at /usr/src/sys/kern/kern_shutdown.c:3=
71
#2 0xc01c2407 in panic () at /usr/src/sys/kern/kern_shutdown.c:542
#3 0xc0213d6b in vdropl (vp=3D0x0) at /usr/src/sys/kern/vfs_subr.c:2309
#4 0xc0213d24 in vdrop (vp=3D0xc164e490) at /usr/src/sys/kern/vfs_subr.c:2=
297
#5 0xc02074c9 in cache_zap (ncp=3D0xc164e490) at /usr/src/sys/kern/vfs_cac=
he.c:244
#6 0xc0207ad1 in cache_purge (vp=3D0xc16477fc) at /usr/src/sys/kern/vfs_ca=
che.c:503
#7 0xc026347d in ufs_reclaim (ap=3D0x0) at /usr/src/sys/ufs/ufs/ufs_inode.=
c:169
#8 0xc026b068 in ufs_vnoperate (ap=3D0x0) at /usr/src/sys/ufs/ufs/ufs_vnop=
s.c:2787
#9 0xc0214590 in vclean (vp=3D0xc16477fc, flags=3D8, td=3D0xc0736980) at v=
node_if.h:958
#10 0xc021493c in vgonel (vp=3D0xc16477fc, td=3D0x0) at /usr/src/sys/kern/v=
fs_subr.c:2720
#11 0xc0210c29 in vlrureclaim (mp=3D0xc132e600) at /usr/src/sys/kern/vfs_su=
br.c:711
#12 0xc0210e6f in vnlru_proc () at /usr/src/sys/kern/vfs_subr.c:764
#13 0xc01af092 in fork_exit (callout=3D0xc0210cc0 <vnlru_proc>, arg=3D0x0, =
frame=3D0x0) at /usr/src/sys/kern/kern_fork.c:796
(kgdb) f 3
#3 0xc0213d6b in vdropl (vp=3D0x0) at /usr/src/sys/kern/vfs_subr.c:2309
2309 panic("vdrop: holdcnt");
(kgdb) l
2304 {
2305 int s;
2306
2307 s =3D splbio();
2308 if (vp->v_holdcnt <=3D 0)
2309 panic("vdrop: holdcnt");
2310 vp->v_holdcnt--;
2311 if (VSHOULDFREE(vp))
2312 vfree(vp);
2313 else
(kgdb) i loc
No locals.
(kgdb) p vp
$1 =3D (struct vnode *) 0x0
(kgdb)=20
---
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