DragonFly v2.11.0.418.g05dcb-DEVELOPMENT hammer_vop_getattr panic

[Sepherosa Ziehau <sepherosa@xxxxxxxxx>]

(kgdb) bt
#0  _get_mycpu (di=<value optimized out>) at ./machine/thread.h:69
#1  md_dumpsys (di=<value optimized out>) at
/usr/src/sys/platform/pc64/x86_64/dump_machdep.c:263
#2  0xffffffff802c1fa5 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:927
#3  0xffffffff80264bfc in db_fncall (dummy1=<value optimized out>,
dummy2=<value optimized out>, dummy3=<value optimized out>,
dummy4=<value optimized out>)
    at /usr/src/sys/ddb/db_command.c:542
#4  0xffffffff802650cf in db_command () at /usr/src/sys/ddb/db_command.c:344
#5  db_command_loop () at /usr/src/sys/ddb/db_command.c:470
#6  0xffffffff80267f61 in db_trap (type=<value optimized out>,
code=<value optimized out>) at /usr/src/sys/ddb/db_trap.c:71
#7  0xffffffff80489248 in kdb_trap (type=<value optimized out>,
code=<value optimized out>, regs=<value optimized out>)
    at /usr/src/sys/platform/pc64/x86_64/db_interface.c:176
#8  0xffffffff8048e614 in trap_fatal (frame=0xffffffe0af61f778,
eva=<value optimized out>) at
/usr/src/sys/platform/pc64/x86_64/trap.c:973
#9  0xffffffff8048edee in trap (frame=0xffffffe0af61f778) at
/usr/src/sys/platform/pc64/x86_64/trap.c:728
#10 0xffffffff8048778e in calltrap () at
/usr/src/sys/platform/pc64/x86_64/exception.S:187
#11 0xffffffff8041985d in hammer_vop_getattr (ap=<value optimized
out>) at /usr/src/sys/vfs/hammer/hammer_vnops.c:1081
#12 0xffffffff8033c167 in vop_getattr (ops=0xffffffe080ed3280,
vp=0xffffffe0af61f920, vap=0x4a4c66b72ad00) at
/usr/src/sys/kern/vfs_vopops.c:355
#13 0xffffffff8033967a in vn_stat (vp=0xffffffe0bc7b9948,
sb=0xffffffe0af61fa18, cred=0xffffffe02f8bcd40) at
/usr/src/sys/kern/vfs_vnops.c:762
#14 0xffffffff80335c8f in kern_stat (nd=0xffffffe0af61fa98,
st=0xffffffe0af61fa18) at /usr/src/sys/kern/vfs_syscalls.c:2644
#15 0xffffffff80335e25 in sys_stat (uap=0xffffffe0af61fb58) at
/usr/src/sys/kern/vfs_syscalls.c:2676
#16 0xffffffff8048f402 in syscall2 (frame=0xffffffe0af61fc08) at
/usr/src/sys/platform/pc64/x86_64/trap.c:1188
#17 0xffffffff804879cf in Xfast_syscall () at
/usr/src/sys/platform/pc64/x86_64/exception.S:320
#18 0x000000000000002b in ?? ()

Coredump is uploaded to ~sephe@leaf/crash/vmcore.0.tbz

Best Regards,
sephe

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Tomorrow Will Never Die