This is today's kernel. Should I test with -DDEBUG_LOCKS?
-----
panic: lockmgr: draining against myself
cpuid = 1; lapic.id = 01000000
Debugger("panic")
Stopped at Debugger+0x41: xorl %eax,%eax
db> trace
Debugger(c029d1ba) at Debugger+0x41
panic(c029ae60,e908e780,e325cd50,0,0) at panic+0xd8
lockmgr(e908e828,10007,e908e7e8,e325cd50,e326099c) at lockmgr+0x3ef
vop_stdlock(e32609d0,e32609e0,c01c51f6,e32609d0,e908e780) at vop_stdlock+0x1f
ufs_vnoperate(e32609d0) at ufs_vnoperate+0x15
vclean(e908e780,8,e325cd50,e908e780,e3260a10) at vclean+0x62
vgonel(e908e780,e325cd50,e908e780,e909b300,e3260a48) at vgonel+0x37
vrecycle(e908e780,0,e325cd50,e908e780,e325cd50) at vrecycle+0x4b
ufs_inactive(e3260a68,e3260a78,c01c4da4,e3260a68,e8482580) at ufs_inactive+0x160
ufs_vnoperate(e3260a68) at ufs_vnoperate+0x15
vput(e908e780) at vput+0xe4
handle_workitem_freeblocks(e8482580,0,e909b300,e909b300,e325cd50) at
handle_workitem_freeblocks+0x193
softdep_setup_freeblocks(e909b300,0,0,e908e780,e909b300) at
softdep_setup_freeblocks+0x31f
ffs_truncate(e908e780,0,0,0,0) at ffs_truncate+0x240
ufs_inactive(e3260c60,e3260c70,c01c4da4,e3260c60,0) at ufs_inactive+0x91
ufs_vnoperate(e3260c60) at ufs_vnoperate+0x15
vput(e908e780,c02e3bdc,e7f65f40,e79d8000,0) at vput+0xe4
handle_workitem_remove(e7f65f40,0,e325cd50,0,0) at handle_workitem_remove+0x15f
process_worklist_item(0,0) at process_worklist_item+0x113
softdep_process_worklist(0) at softdep_process_worklist+0x106
sched_sync(0,e3260d48,e325cd50,c01c414c,0) at sched_sync+0x190
fork_exit(c01c414c,0,e3260d48) at fork_exit+0x88
fork_trampoline() at fork_trampoline+0x37
-----
(kgdb) where
#0 doadump () at ../../../kern/kern_shutdown.c:213
#1 0xc0188e4c in boot (howto=260) at ../../../kern/kern_shutdown.c:346
#2 0xc018905d in panic (fmt=0xc028c74a "from debugger")
at ../../../kern/kern_shutdown.c:490
#3 0xc012f591 in db_panic (addr=-1071235275, have_addr=0, count=-1,
modif=0xe3260804 "") at ../../../ddb/db_command.c:449
#4 0xc012f52f in db_command (last_cmdp=0xc02c8fc4, cmd_table=0xc02c8de4,
aux_cmd_tablep=0xc02c31c8, aux_cmd_tablep_end=0xc02c31cc)
at ../../../ddb/db_command.c:345
#5 0xc012f5fb in db_command_loop () at ../../../ddb/db_command.c:471
#6 0xc013198f in db_trap (type=3, code=0) at ../../../ddb/db_trap.c:72
#7 0xc0263c76 in kdb_trap (type=3, code=0, regs=0xe3260900)
at ../../../i386/i386/db_interface.c:161
#8 0xc0277c5c in trap (frame={tf_fs = -385351656, tf_es = -484048880,
tf_ds = -1072168944, tf_edi = 7, tf_esi = 256, tf_ebp = -484046520,
tf_isp = -484046548, tf_ebx = -1071010208, tf_edx = -484061872,
tf_ecx = 1, tf_eax = 18, tf_trapno = 3, tf_err = 0,
tf_eip = -1071235275, tf_cs = 8, tf_eflags = 582, tf_esp = -1070878077,
tf_ss = -1071001158}) at ../../../i386/i386/trap.c:585
#9 0xc0263f35 in Debugger (msg=0xc029d1ba "panic") at machine/cpufunc.h:68
#10 0xc0189048 in panic (fmt=0xc029ae60 "lockmgr: draining against myself")
at ../../../kern/kern_shutdown.c:477
#11 0xc017ef37 in lockmgr (lkp=0xe908e828, flags=65543, interlkp=0xe908e7e8,
td=0xe325cd50) at ../../../kern/kern_lock.c:427
#12 0xc01c0bef in vop_stdlock (ap=0xe32609d0)
at ../../../kern/vfs_default.c:282
#13 0xc02396bd in ufs_vnoperate (ap=0xe32609d0)
at ../../../ufs/ufs/ufs_vnops.c:2660
...
(kgdb) up 11
#11 0xc017ef37 in lockmgr (lkp=0xe908e828, flags=65543, interlkp=0xe908e7e8,
td=0xe325cd50) at ../../../kern/kern_lock.c:427
427 panic("lockmgr: draining against myself");
(kgdb) list
422 * never drain if we do. Unfortunately, we have no way to
423 * check for holding a shared lock, but at least we can
424 * check for an exclusive one.
425 */
426 if (lkp->lk_lockholder == pid)
427 panic("lockmgr: draining against myself");
428
429 error = acquiredrain(lkp, extflags);
430 if (error)
431 break;
(kgdb) up
#12 0xc01c0bef in vop_stdlock (ap=0xe32609d0)
at ../../../kern/vfs_default.c:282
282 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, ap->a_td));
(kgdb) list
277 } */ *ap;
278 {
279 struct vnode *vp = ap->a_vp;
280
281 #ifndef DEBUG_LOCKS
282 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, ap->a_td));
283 #else
284 return (debuglockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock,
285 ap->a_td, "vop_stdlock", vp->filename, vp->line));
286 #endif
--
Jun Kuriyama <[EMAIL PROTECTED]> // IMG SRC, Inc.
<[EMAIL PROTECTED]> // FreeBSD Project
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