Re: kern/41189: kernel panic xen dom0 using mke2fs & WAPBL

[Jason White <jdwhite%iastate.edu@localhost>]

On Fri, Apr 17, 2009 at 08:30PM +0000, Christos Zoulas wrote:
>
> Did you run mke2fs on a partition that used to contain an ffs filesystem?

        No.

> Was that mounted?

        No.

> |  This panic happens when I unmount an ext2 partition:
> |
> |  panic: kernel diagnostic assertion "vp->v_tag == VT_UFS" failed: file
>
> This is my fault, new patch:
[...]
Running 'mke2fs -v -I 128 /dev/sd0m':

panic: kernel diagnostic assertion "rw_lock_held(&wl->wl_rwlock)" 
failed: file "/usr/src/sys/kern/vfs_wapbl.c", line 1540
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff804bfddd cs e030 rflags 246 cr2  40a5d0 
cpl 0 rsp ffffa0001e829790
Stopped in pid 504.1 (mke2fs) at        netbsd:breakpoint+0x5:  leave
breakpoint() at netbsd:breakpoint+0x5
panic() at netbsd:panic+0x242
__kernassert() at netbsd:__kernassert+0x2d
wapbl_add_buf() at netbsd:wapbl_add_buf+0x42
bdwrite() at netbsd:bdwrite+0xc0
ffs_update() at netbsd:ffs_update+0x1ef
ufs_full_fsync() at netbsd:ufs_full_fsync+0x35d
ffs_fsync() at netbsd:ffs_fsync+0x69
VOP_FSYNC() at netbsd:VOP_FSYNC+0x34
vinvalbuf() at netbsd:vinvalbuf+0xf6
spec_close() at netbsd:spec_close+0x8a
VOP_CLOSE() at netbsd:VOP_CLOSE+0x29
vn_close() at netbsd:vn_close+0x51
closef() at netbsd:closef+0x68
fd_close() at netbsd:fd_close+0x134
syscall() at netbsd:syscall+0xb4
ds          0x97a0
es          0x121c
fs          0x97a0
gs          0x12f7
rdi         0
rsi         0x1
rbp         0xffffa0001e829790
rbx         0xffffa0001e8297a0
rdx         0
rcx         0
rax         0x1
r8          0xffffffff80b53700  cpu_info_primary
r9          0x1
r10         0xffffa0001e8296b0
r11         0xffffffff804fd2b0  xenconscn_putc
r12         0x104
r13         0xffffffff809f39b0
r14         0x5
r15         0xffffa0001e1c2e58
rip         0xffffffff804bfddd  breakpoint+0x5
cs          0xe030
rflags      0x246
rsp         0xffffa0001e829790
ss          0xe02b
netbsd:breakpoint+0x5:  leave
db>

-- 
Jason White
Systems Analyst
Information Technology Services
Iowa State University