Re: [Bluetooth] recursive locking in l2cap_sock_accept/bt_accept_dequeue

2006-09-17 Thread Marcel Holtmann 
Hi Pekka,

 Got this from a 2.6.18rc7-based fedora-devel kernel:
 
 =
 [ INFO: possible recursive locking detected ]
 2.6.17-1.2647.fc6 #1
 -
 sdpd/4955 is trying to acquire lock:
  (sk_lock-AF_BLUETOOTH){--..}, at: [f0cea241] bt_accept_dequeue+0x26/0xc6 
 [bluetooth]
 
 but task is already holding lock:
  (sk_lock-AF_BLUETOOTH){--..}, at: [f0b90088] l2cap_sock_accept+0x41/0x11e 
 [l2cap]
 
 other info that might help us debug this:
 1 lock held by sdpd/4955:
  #0:  (sk_lock-AF_BLUETOOTH){--..}, at: [f0b90088] 
 l2cap_sock_accept+0x41/0x11e [l2cap]
 
 stack backtrace:
  [c04051ee] show_trace_log_lvl+0x58/0x171
  [c0405802] show_trace+0xd/0x10
  [c040591b] dump_stack+0x19/0x1b
  [c043b9e1] __lock_acquire+0x778/0x99c
  [c043c176] lock_acquire+0x4b/0x6d
  [c05b27e3] lock_sock+0xac/0xbc
  [f0cea241] bt_accept_dequeue+0x26/0xc6 [bluetooth]
  [f0b90129] l2cap_sock_accept+0xe2/0x11e [l2cap]
  [c05b1bd7] sys_accept+0xd8/0x179
  [c05b1d1f] sys_socketcall+0xa7/0x186
  [c0403faf] syscall_call+0x7/0xb
 DWARF2 unwinder stuck at syscall_call+0x7/0xb
 Leftover inexact backtrace:
  [c0405802] show_trace+0xd/0x10
  [c040591b] dump_stack+0x19/0x1b
  [c043b9e1] __lock_acquire+0x778/0x99c
  [c043c176] lock_acquire+0x4b/0x6d
  [c05b27e3] lock_sock+0xac/0xbc
  [f0cea241] bt_accept_dequeue+0x26/0xc6 [bluetooth]
  [f0b90129] l2cap_sock_accept+0xe2/0x11e [l2cap]
  [c05b1bd7] sys_accept+0xd8/0x179
  [c05b1d1f] sys_socketcall+0xa7/0x186
  [c0403faf] syscall_call+0x7/0xb

what where you doing when this happened?

Regards

Marcel


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Re: [Bluetooth] recursive locking in l2cap_sock_accept/bt_accept_dequeue

2006-09-17 Thread Pekka Pietikainen 
On Sun, Sep 17, 2006 at 02:18:26PM +0200, Marcel Holtmann wrote:
 Hi Pekka,
 
  Got this from a 2.6.18rc7-based fedora-devel kernel:
  
  =
  [ INFO: possible recursive locking detected ]
  2.6.17-1.2647.fc6 #1

  sdpd/4955 is trying to acquire lock:
   (sk_lock-AF_BLUETOOTH){--..}, at: [f0cea241] bt_accept_dequeue+0x26/0xc6 
  [bluetooth]
 
 what where you doing when this happened?
Hiya

Hmn. Plugged my USB BT dongle in, started gnome-obex-server and sent a few
pictures from my cellphone to the box, nothing fancy.. Bluetooth daemons
running obviously at this time...


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