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Date: Tue, 28 Jun 2005 22:37:00 +0200
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: freebsd-current@FreeBSD.org
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Cc: jeff@FreeBSD.org
Subject: VFS panic (bp 0xd6523fdc wrong b_bufobj 0 should be 0xc27d2940).
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Hi.

I get the panic below while running this script:

#!/bin/sh

for dir in `jot 5 1 5`; do
	rm -rf $dir
	mkdir $dir
done
for dir in `jot 5 1 5`; do
	cd $dir
	iozone -s 64m -r 512k >output.log 2>&1 &
	cd ..
done

panic: bp 0xd6523fdc wrong b_bufobj 0 should be 0xc27d2940
cpuid =3D 2
KDB: enter: panic
[thread pid 517 tid 100125 ]
Stopped at      kdb_enter+0x2b: nop    =20
db> tr
Tracing pid 517 tid 100125 td 0xc246c180
kdb_enter(c05d1349) at kdb_enter+0x2b
panic(c05d6e92,d6523fdc,0,c27d2940,d6528a2c) at panic+0x127
reassignbuf(d6528a2c,c246c180,ed614a00,c04d87e0,d6528a2c) at reassignbuf+0x=
148
bdirty(d6528a2c,c27d2880,c0cd0238,ffffffff,2) at bdirty+0x86
bdwrite(d6528a2c) at bdwrite+0x2ac
cluster_write(c27d2880,d6528a2c,2f70000,0,7f) at cluster_write+0x48c
ffs_write(ed614c04,0,0,c06031c0,ed614bb8) at ffs_write+0x508
VOP_WRITE_APV(c060ade0,ed614c04) at VOP_WRITE_APV+0x112
vn_write(c23e4480,ed614c78,c27bd380,0,c246c180) at vn_write+0x1ea
dofilewrite(c246c180,c23e4480,3,8300000,80000) at dofilewrite+0xa8
write(c246c180,ed614d04,3,107,246) at write+0x39
syscall(3b,3b,bfbf003b,0,5e) at syscall+0x22f
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (4, FreeBSD ELF32, write), eip =3D 0x280de65b, esp =3D 0xbfbfe8=
cc, ebp =3D 0xbfbfea08 ---
db>=20

This is recent HEAD. The box is Dual Xeon (HTT enabled).

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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