On Fri, Feb 23, 2007 at 07:24:50AM -0700, Andy Ruhl wrote:
> On 2/22/07, Patrick Welche <prlw1@newn.cam.ac.uk> wrote:
> >
> >I thought I would try, and got kern/35787 which is a bit more exciting...
> 
> Is that the right pr number? I can't find it.

I stupidly marked it confidential in error - if anyone can change
that, it would be great. The moral is, with an i386 kernel built
from yesterday's source, mount_smbfs gives me reproducibly:

#17 0xc02f43c7 in panic (fmt=0xc0508cec "setrunnable: !L_SINTR")
    at ../../../../kern/subr_prf.c:243
#18 0xc02de6ba in setrunnable (l=0xcbfe74c0)
    at ../../../../kern/kern_synch.c:830
#19 0xc02fad5e in selwakeup (sip=0xc1175c58)
    at ../../../../kern/sys_generic.c:1176
#20 0xc0317978 in sowakeup (so=0xc1175bd8, sb=0xc1175c58, code=1)
    at ../../../../sys/select.h:59
#21 0xc0146e2b in tcp_input (m=0xc1179d00)
    at ../../../../netinet/tcp_input.c:2536
#22 0xc013e69f in ip_input (m=0xc1179d00)
    at ../../../../netinet/ip_input.c:1035

amusingly the sync then locks against itself:

#0  0xc036991b in cpu_reboot (howto=0, bootstr=0x0)
    at ../../../../arch/i386/i386/machdep.c:870
#1  0xc02f43d3 in panic (fmt=0xc0507caf "LOCKDEBUG")
    at ../../../../kern/subr_prf.c:246
#2  0xc02edfd8 in lockdebug_abort1 (ld=0xc05b4630, lk=0xc05bc600, 
    func=0xc04a6114 "mutex_vector_enter", 
    msg=0xc05081c7 "locking against myself")
    at ../../../../kern/subr_lockdebug.c:605
#3  0xc02ee0a1 in lockdebug_abort (id=5, lock=0xc05b050c, ops=0xc0572488, 
    func=0xc04a6114 "mutex_vector_enter", 
    msg=0xc05081c7 "locking against myself")
    at ../../../../kern/subr_lockdebug.c:649
#4  0xc02cdbbc in mutex_abort (mtx=0xc05b050c, 
    func=0xc04a6114 "mutex_vector_enter", 
    msg=0xc05081c7 "locking against myself")
    at ../../../../kern/kern_mutex.c:278
#5  0xc02ce0f9 in mutex_vector_enter (mtx=0xc05b050c)
    at ../../../../kern/kern_mutex.c:501
#6  0xc02de8f5 in suspendsched () at ../../../../kern/kern_synch.c:962
#7  0xc03286d8 in vfs_shutdown () at ../../../../kern/vfs_subr.c:2218
#8  0xc03699a4 in cpu_reboot (howto=256, bootstr=0x0)
    at ../../../../arch/i386/i386/machdep.c:856
#9  0xc019f750 in db_sync_cmd (addr=-1070180156, have_addr=false, 
    count=-1067967803, modif=0xcad2bab8 "Ã\032XÀÄ\032XÀc")
    at ../../../../ddb/db_command.c:838
#10 0xc019fc40 in db_command (last_cmdp=0xc056c1bc, cmd_table=0x0)
    at ../../../../ddb/db_command.c:511
#11 0xc019fff8 in db_command_loop () at ../../../../ddb/db_command.c:299
#12 0xc01a2dd7 in db_trap (type=1, code=0) at ../../../../ddb/db_trap.c:101
#13 0xc0365a46 in kdb_trap (type=1, code=0, regs=0xcad2bce0)
    at ../../../../arch/i386/i386/db_interface.c:226
#14 0xc0373385 in trap (frame=0xcad2bce0)
    at ../../../../arch/i386/i386/trap.c:308
#15 0xc0102f7d in calltrap ()
#16 0xc03658c4 in cpu_Debugger () at ./machine/cpufunc.h:332

Mutex error: mutex_vector_enter: locking against myself

lock address : 0x00000000c05b050c type     :               spin
shared holds :                  0 exclusive:                  1
shares wanted:                  0 exclusive:                  0
current cpu  :                  0 last held:                  0
current lwp  : 000000000000000000 last held: 000000000000000000
last locked  : 0x00000000c03facc2 unlocked : 0x00000000c02fac3c
owner field  : 0x0000000000010c00 wait/spin:                0/1

panic: LOCKDEBUG


Cheers,

Patrick