LOR #269

FreeBSD 8.0-BETA1 ia64

Looks like LOR #269, with different line numbers:

lock order reversal:
 1st 0xa00000001e599c20 bufwait (bufwait) _at_ /usr/src/sys/kern/vfs_bio.c:2558
 2nd 0xe0000000106de7b0 snaplk (snaplk) _at_ /usr/src/sys/ufs/ffs/ffs_snapshot.c:793
KDB: stack backtrace:
db_trace_self(0xe000000004135d60) at db_trace_self+0x20
db_trace_self_wrapper(0xe00000000443add0) at db_trace_self_wrapper+0x70
kdb_backtrace(0xe0000000049da960, 0xe0000000044639d0) at kdb_backtrace+0xc0
_witness_debugger(0x1, 0xe000000004888610, 0xe000000004465270, 0x999, 0xe0000000048a9da8) at _witness_debugger+0x60
witness_checkorder(0xe0000000106de7b0, 0x9, 0xffffffffffffffff, 0x319, 0xe000000010a06298) at witness_checkorder+0x12c0
__lockmgr_args(0xe0000000106de7b0, 0x80400, 0xe000000010a06298, 0xe0000000048a9e10, 0x50, 0x33, 0xe0000000048a9da8, 0x319) at __lockmgr_args+0xe60
ffs_lock(0xa000000032b3cdd0, 0xe0000000106de7b0, 0x80400) at ffs_lock+0x130
VOP_LOCK1_APV(0xe0000000049ac600, 0xa000000032b3cdb0, 0xe00000000488e978) at VOP_LOCK1_APV+0x1d0
_vn_lock(0xe000000010a061d8, 0x80400, 0xe0000000048a9da8, 0x319, 0xe000000010a061e8, 0xa000000032b3cdd0, 0xa000000032b3cdc8, 0xa000000032b3cdc0) at _vn_lock+0xf0
ffs_snapshot(0xe0000000106fb780, 0xa000000032b3cfc8, 0xa000000032b3ce08, 0xe0000000107b4000, 0xe00000001094a700, 0x0, 0xe000000010693030, 0xe00000001094a900) at ffs_snapshot+0x3f50
ffs_mount(0x0, 0xe0000000048abc50, 0xa000000032b3d100, 0xa000000032b3d100) at ffs_mount+0x2160
vfs_donmount(0x0, 0x211000, 0xe00000001094a000) at vfs_donmount+0x1d80
nmount(0xe00000001064d270, 0xa000000032b3d4e8, 0x0, 0xe0000000048283e0) at nmount+0xf0
syscall(0xa000000032b3d400, 0x17a, 0x201000, 0xe00000001064d270, 0xe0000000107c3120, 0xe000000004986b90, 0x17a, 0xa000000032b3d4e8) at syscall+0x3e0
epc_syscall_return() at epc_syscall_return

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 928 8233 
Fax: +44 (0)117 929 4423