Re: kern/39307: mfs will sometimes panic at umount time

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

cube%cubidou.net@localhost wrote:

> >Synopsis:       mfs will sometimes panic at umount time

I see the following reproducible panics on cobalt at shutdown:

---
NetBSD 4.99.72 (GENERIC) #0: Wed Sep 10 04:48:22 PDT 2008
        
builds@wb35:/home/builds/ab/HEAD/cobalt/200809100002Z-obj/home/builds/ab/HEAD/src/sys/arch/cobalt/compile/GENERIC

 :

trap: TLB miss (load or instr. fetch) in kernel mode
status=0xff03, cause=0x8, epc=0x802f9228, vaddr=0xc6474034
pid=125 cmd=mount_mfs usp=0x7fffca00 ksp=0xc6481d10
Stopped in pid 125.1 (mount_mfs) at     netbsd:atomic_dec_uint_nv+0x18: lw      
s
0,0(s2)
db> tr
atomic_dec_uint_nv+18 (c6474034,83c13ab4,0,0) ra 80255d34 sz 32
vfs_destroy+18 (c6474034,83c13ab4,0,0) ra 8025cfe8 sz 24
do_sys_mount+818 (83c57800,83c13ab4,0,7fffef94) ra 8025d02c sz 256
sys___mount50+3c (83c57800,83c13ab4,c6481f68,7fffef94) ra 802a2050 sz 48
syscall_plain+130 (83c57800,83c13ab4,c6481f68,7fffef94) ra 8029bbac sz 80
mips3_SystemCall+bc (83c57800,83c13ab4,c6481f68,7fffef94) ra 7de3d7b0 sz 0
PC 0x7de3d7b0: not in kernel space
0+7de3d7b0 (83c57800,83c13ab4,c6481f68,7fffef94) ra 0 sz 0
User-level: pid 125.1
db> 

---
Izumi Tsutsui