Messages in this thread | | | Date | Wed, 4 Oct 2006 23:17:04 +0200 | From | "Alessandro Suardi" <> | Subject | 2.6.18-git21, possible recursive locking in kseriod ends up in DWARF2 unwinder stuck |
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Non-fatal (box is still alive and apparently well) on boot, FC5-uptodate on a Dell Latitude C640. From the dmesg ring:
[ 8.680000] ============================================= [ 8.680000] [ INFO: possible recursive locking detected ] [ 8.680000] 2.6.18-git21 #1 [ 8.680000] --------------------------------------------- [ 8.680000] kseriod/163 is trying to acquire lock: [ 8.680000] (&ps2dev->cmd_mutex/1){--..}, at: [<c03198c3>] ps2_command+0x89/0x358 [ 8.680000] [ 8.680000] but task is already holding lock: [ 8.680000] (&ps2dev->cmd_mutex/1){--..}, at: [<c03198c3>] ps2_command+0x89/0x358 [ 8.680000] [ 8.680000] other info that might help us debug this: [ 8.680000] 4 locks held by kseriod/163: [ 8.680000] #0: (serio_mutex){--..}, at: [<c0317a5f>] serio_thread+0x11/0x2ca [ 8.680000] #1: (&serio->drv_mutex){--..}, at: [<c0316f2c>] serio_connect_driver+0x17/0x32 [ 8.680000] #2: (psmouse_mutex){--..}, at: [<c0320a90>] psmouse_connect+0x11/0x24a [ 8.680000] #3: (&ps2dev->cmd_mutex/1){--..}, at: [<c03198c3>] ps2_command+0x89/0x358 [ 8.680000] [ 8.680000] stack backtrace: [ 8.680000] [<c010339c>] show_trace_log_lvl+0x24/0x39 [ 8.680000] [<c0103b54>] dump_stack+0x24/0x28 [ 8.680000] [<c0129c8f>] __lock_acquire+0x128/0xa1c [ 8.680000] [<c012a897>] lock_acquire+0x6a/0x84 [ 8.680000] [<c03d14f5>] mutex_lock_nested+0xd8/0x25b [ 8.680000] [<c03198c3>] ps2_command+0x89/0x358 [ 8.680000] [<c031fed9>] psmouse_sliced_command+0x2c/0x74 [ 8.680000] [<c0323be0>] synaptics_pt_write+0x2a/0x5a [ 8.680000] [<c031978e>] ps2_sendbyte+0x51/0xfd [ 8.680000] [<c031994f>] ps2_command+0x115/0x358 [ 8.680000] [<c031fa59>] psmouse_probe+0x24/0x7d [ 8.680000] [<c0320b8d>] psmouse_connect+0x10e/0x24a [ 8.680000] [<c0316f36>] serio_connect_driver+0x21/0x32 [ 8.680000] [<c02e0615>] really_probe+0x3c/0xc3 [ 8.680000] [<c02dfaea>] bus_for_each_drv+0x52/0x84 [ 8.680000] [<c02e07a9>] device_attach+0x5e/0x72 [ 8.680000] [<c02dfa6c>] bus_attach_device+0x24/0x50 [ 8.680000] [<c02ded5c>] device_add+0x37d/0x4bf [ 8.680000] [<c0317b29>] serio_thread+0xdb/0x2ca [ 8.680000] [<c0123d19>] kthread+0xc5/0xf4 [ 8.680000] [<c0102edb>] kernel_thread_helper+0x7/0x10 [ 8.680000] DWARF2 unwinder stuck at kernel_thread_helper+0x7/0x10 [ 8.680000] [ 8.680000] Leftover inexact backtrace: [ 8.680000] [ 8.680000] =======================
--alessandro
"Well a man has two reasons for things that he does the first one is pride and the second one is love all understandings must come by this way"
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