linux-kernel - 2.6.18-rc5-mm1 + all hotfixes -- INFO: possible recursive locking detected

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Date:	Tue, 5 Sep 2006 10:37:51 -0700
From:	"Miles Lane" <miles.lane@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...l.org>,
	"Herbert Xu" <herbert@...dor.apana.org.au>
Subject: 2.6.18-rc5-mm1 + all hotfixes -- INFO: possible recursive locking detected

ieee1394: Node changed: 0-01:1023 -> 0-00:1023
ieee1394: Node changed: 0-02:1023 -> 0-01:1023
ieee1394: Node suspended: ID:BUS[0-00:1023]  GUID[0080880002103eae]

=============================================
[ INFO: possible recursive locking detected ]
2.6.18-rc5-mm1 #2
---------------------------------------------
knodemgrd_0/2321 is trying to acquire lock:
 (&s->rwsem){----}, at: [<f8958897>] nodemgr_probe_ne+0x311/0x38d [ieee1394]

but task is already holding lock:
 (&s->rwsem){----}, at: [<f8959078>] nodemgr_host_thread+0x717/0x883 [ieee1394]

other info that might help us debug this:
2 locks held by knodemgrd_0/2321:
 #0:  (nodemgr_serialize){--..}, at: [<c11e76cd>]
mutex_lock_interruptible+0x1c/0x21
 #1:  (&s->rwsem){----}, at: [<f8959078>]
nodemgr_host_thread+0x717/0x883 [ieee1394]

stack backtrace:
 [<c1003c97>] dump_trace+0x69/0x1b7
 [<c1003dfa>] show_trace_log_lvl+0x15/0x28
 [<c10040f5>] show_trace+0x16/0x19
 [<c1004110>] dump_stack+0x18/0x1d
 [<c102f1e1>] __lock_acquire+0x7a2/0x9f8
 [<c102f70a>] lock_acquire+0x56/0x74
 [<c102b805>] down_write+0x27/0x41
 [<f8958897>] nodemgr_probe_ne+0x311/0x38d [ieee1394]
 [<f8959098>] nodemgr_host_thread+0x737/0x883 [ieee1394]
 [<c1028c19>] kthread+0xaf/0xde
 [<c100397b>] kernel_thread_helper+0x7/0x10
DWARF2 unwinder stuck at kernel_thread_helper+0x7/0x10

Leftover inexact backtrace:

 [<c1003dfa>] show_trace_log_lvl+0x15/0x28
 [<c10040f5>] show_trace+0x16/0x19
 [<c1004110>] dump_stack+0x18/0x1d
 [<c102f1e1>] __lock_acquire+0x7a2/0x9f8
 [<c102f70a>] lock_acquire+0x56/0x74
 [<c102b805>] down_write+0x27/0x41
 [<f8958897>] nodemgr_probe_ne+0x311/0x38d [ieee1394]
 [<f8959098>] nodemgr_host_thread+0x737/0x883 [ieee1394]
 [<c1028c19>] kthread+0xaf/0xde
 [<c100397b>] kernel_thread_helper+0x7/0x10
 =======================
ieee1394: Node resumed: ID:BUS[0-00:1023]  GUID[0080880002103eae]
ieee1394: Node changed: 0-00:1023 -> 0-01:1023
ieee1394: Node changed: 0-01:1023 -> 0-02:1023
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