Been getting this one in kernels for the last few days, actually,
with the last one being made late Friday.

panic: lockmgr: draining against myself

#0  0xf013a91d in lockstatus (lkp=0xf4a23d94)
    at ../../../../kern/kern_lock.c:154
#1  0xf0200803 in cpu_reboot (howto=256, bootstr=0x0)
    at ../../../../arch/i386/i386/machdep.c:1350
#2  0xf0146799 in panic (fmt=0xf013a91d "lockmgr: draining against myself")
    at ../../../../kern/subr_prf.c:212
#3  0xf013adfa in lockmgr (lkp=0xf4aa6618, flags=65543, interlkp=0xf4a3e914)
    at ../../../../kern/kern_lock.c:402
#4  0xf01eb7d2 in ufs_lock (v=0xf4a23de4)
    at ../../../../ufs/ufs/ufs_vnops.c:1580
#5  0xf015e601 in vclean (vp=0xf4a3e888, flags=8, p=0xf48e59c0)
    at ../../../../sys/vnode_if.h:724
#6  0xf015e83b in vgonel (vp=0xf4a3e888, p=0xf48e59c0)
    at ../../../../kern/vfs_subr.c:1254
#7  0xf015d999 in getnewvnode (tag=VT_LFS, mp=0xf049c000, vops=0xf0475a00, 
    vpp=0xf4a23e90) at ../../../../kern/vfs_subr.c:434
#8  0xf01ddf0f in lfs_vcreate (mp=0xf049c000, ino=6238, vpp=0xf4a23e90)
    at ../../../../ufs/lfs/lfs_alloc.c:267
#9  0xf01e5331 in lfs_vget (mp=0xf049c000, ino=6238, vpp=0xf4a23f00)
    at ../../../../ufs/lfs/lfs_vfsops.c:662
#10 0xf01e3d85 in lfs_bmapv (p=0xf48e59c0, v=0xf4a23f88, retval=0xf4a23f80)
    at ../../../../ufs/lfs/lfs_syscalls.c:646
#11 0xf020797a in syscall (frame={tf_es = 31, tf_ds = 31, tf_edi = 0, 
      tf_esi = -272638864, tf_ebp = -272638856, tf_ebx = 4, tf_edx = 32800, 
      tf_ecx = 36864, tf_eax = 184, tf_trapno = 3, tf_err = 2, 
      tf_eip = 1074029355, tf_cs = 23, tf_eflags = 514, tf_esp = -272638944, 
      tf_ss = 31, tf_vm86_es = 0, tf_vm86_ds = 0, tf_vm86_fs = 0, 
      tf_vm86_gs = 0}) at ../../../../arch/i386/i386/trap.c:782

It was the lfs_cleanerd running, of course.

					Gary D. Duzan