[linux-dvb] [BUG]: Mantis + VP-1034 driver lock up machine

Michel Verbraak michel at verbraak.org
Wed Jan 17 13:26:23 CET 2007


As previous reported by me I had sometimes problems of my machine locking
up probably by the driver.

This morning I experienced the same type of crash and had a tail -f
/var/log/messages running and saw the following appear:

Jan 17 06:54:37 garfield kernel: mantis start feed & dma
Jan 17 06:54:47 garfield kernel: BUG: soft lockup detected on CPU#0!
Jan 17 06:54:47 garfield kernel:  [<c040510b>] dump_trace+0x69/0x1af
Jan 17 06:54:47 garfield kernel:  [<c0405269>] show_trace_log_lvl+0x18/0x2c
Jan 17 06:54:47 garfield kernel:  [<c040581c>] show_trace+0xf/0x11
Jan 17 06:54:47 garfield kernel:  [<c0405916>] dump_stack+0x15/0x17
Jan 17 06:54:47 garfield kernel:  [<c044b1c1>] softlockup_tick+0xad/0xc4
Jan 17 06:54:47 garfield kernel:  [<c042e279>] update_process_times+0x39/0x5c
Jan 17 06:54:47 garfield kernel:  [<c0418912>]
smp_apic_timer_interrupt+0x5b/0x61
Jan 17 06:54:47 garfield kernel:  [<c0404a0f>] apic_timer_interrupt+0x1f/0x24
Jan 17 06:54:47 garfield kernel: DWARF2 unwinder stuck at
apic_timer_interrupt+0x1f/0x24
Jan 17 06:54:47 garfield kernel: Leftover inexact backtrace:
Jan 17 06:54:47 garfield kernel:  [<f8a1320a>]
mb86a16_set_frontend+0x433/0x1c3d [mb86a16]
Jan 17 06:54:47 garfield kernel:  [<c042dfbb>] del_timer_sync+0xa/0x14
Jan 17 06:54:47 garfield kernel:  [<c060c3a1>] schedule_timeout+0x82/0x96
Jan 17 06:54:47 garfield kernel:  [<c060d4e8>] _spin_lock_irqsave+0x9/0xd
Jan 17 06:54:47 garfield kernel:  [<f8a12dd7>]
mb86a16_set_frontend+0x0/0x1c3d [mb86a16]
Jan 17 06:54:47 garfield kernel:  [<f89887cb>]
dvb_frontend_thread+0x239/0x2dc [dvb_core]
Jan 17 06:54:47 garfield kernel:  [<c0436974>]
autoremove_wake_function+0x0/0x35
Jan 17 06:54:47 garfield kernel:  [<f8988592>]
dvb_frontend_thread+0x0/0x2dc [dvb_core]
Jan 17 06:54:47 garfield kernel:  [<c0404ce7>] kernel_thread_helper+0x7/0x10
Jan 17 06:54:47 garfield kernel:  =======================

This was about 20 seconds after a proces of mine opened one handle to the
frontend device and two handles to the demux device and the only ioctl
issued was FE_GET_FRONTEND to the frontend device.

I wil try to get some more logging tonight.

Regards,

Michel.



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