DragonFlyBSD

boot0cfg -s 1 /dev/serno/... cause following panic:

panic: assertion: LIST_FIRST(&bp->b_dep) == NULL in vfs_vmio_release
cpuid = 0
Trace beginning at frame 0xdabf49f0
panic(ffffffff,0,c03d2dec,dabf4a24,dab811d8) at panic+0x19d
panic(c03d2dec,c03fa8b0,c03bcdbe,c4358c18,c1236038) at panic+0x19d
vfs_vmio_release(c042a75c,0,0,dab811d8,da865b48) at vfs_vmio_release+0x26e
brelse(c4358c18,dabf4afc,c01e0d5d,c03f8b14,d73fe664) at brelse+0x3e1
bpdone(c4358c18,1,da9d5934,c4358c18) at bpdone+0x3ec
biodone(c4358c48,c4358c48,d804b450,d73fe630,d72379f8) at biodone+0x1af
diskstrategy(dabf4b2c,1000,dabf4b3c,c0424bc8,d73fe630,c4358c48) at
diskstrategy+0x70
dev_dstrategy_chain(d73fe630,c4358c48,c04322e0,d7367220,40) at
dev_dstrategy_chain+0x9e
devfs_spec_strategy(dabf4b74,c0432368,c043eb20,c1236038,4) at
devfs_spec_strategy+0x120
vop_strategy(c043eb20,d72379f8,c4358c48,c4358c18,c4358e30) at vop_strategy+0x82
vn_strategy(d72379f8,c4358c48,da865b48) at vn_strategy+0xba
bawrite(c4358c18,0,c03a1393,d8089674,da865b48) at bawrite+0xc0
hammer_io_flush(da865b48,0,0,d808018c,dabf4c5c) at hammer_io_flush+0x1ad
hammer_flusher_flush_undos(d8080000,0,0,0,0) at hammer_flusher_flush_undos+0x6f
hammer_vop_fsync(dabf4c5c,c0432308,d7367220,20002,20000) at
hammer_vop_fsync+0xe9
vop_fsync(d7367220,d723bd78,1,1,0) at vop_fsync+0x7e
sys_fsync(dabf4cf0,dabf4d00,4,dab811d8,dab811d8) at sys_fsync+0xab
syscall2(dabf4d40) at syscall2+0x272
Xint0x80_syscall() at Xint0x80_syscall+0x36
Debugger("panic")

core dump is in sephe@leaf:~crash

Best Regards,
sephe