[EMAIL PROTECTED] wrote:
> Hi,
>
> I am running a Hauppauge NOVA-S plus (cx2388x based card) and an older
> technotrend S-1500 card in the same chassis. Trying to debug other problems I
> have turned on lock debugging in the kernel and have started getting the
> following dump when both cards are started:
>
> --------------------------------------------------------------------------------------------
>
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547514]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547515]
> =================================
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547519] [ INFO: inconsistent lock
> state ]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547521] 2.6.23.14 #5
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547523]
> ---------------------------------
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547525] inconsistent {softirq-on-W}
> -> {in-softirq-W} usage.
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547527] startup1.pl/13742
> [HC0[0]:SC1[1]:HE1:SE0] takes:
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547532] (&dvbdemux->lock){-+..}, at:
> [<f0a10df9>] dvb_dmx_swfilter_packets+0x1f/0x49 [dvb_core]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547590] {softirq-on-W} state was
> registered at:
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547598] [<c0440eb7>]
> __lock_acquire+0x4aa/0xc1a
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547615] [<c04416a1>]
> lock_acquire+0x7a/0x94
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547682] [<c06339bd>]
> _spin_lock+0x2e/0x58
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547712] [<f0a10c8b>]
> dvb_dmx_swfilter+0x21/0x104 [dvb_core]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547737] [<f0d22383>]
> videobuf_dvb_thread+0x83/0x105 [video_buf_dvb]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547752] [<c0435b9c>]
> kthread+0x3b/0x63
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547804] [<c0405b9f>]
> kernel_thread_helper+0x7/0x10
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547874] [<ffffffff>] 0xffffffff
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547888] irq event stamp: 22178648
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547889] hardirqs last enabled at
> (22178648): [<c04298e8>] tasklet_action+0x26/0xa8
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547893] hardirqs last disabled at
> (22178647): [<c04298cd>] tasklet_action+0xb/0xa8
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547896] softirqs last enabled at
> (22178536): [<c0429889>] __do_softirq+0xe3/0xe9
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547899] softirqs last disabled at
> (22178645): [<c0407046>] do_softirq+0x61/0xc7
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547903]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547903] other info that might help
> us debug this:
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547904] no locks held by
> startup1.pl/13742.
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547906]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547906] stack backtrace:
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547908] [<c0405f18>]
> show_trace_log_lvl+0x1a/0x2f
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547911] [<c040690a>]
> show_trace+0x12/0x14
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547914] [<c0406922>]
> dump_stack+0x16/0x18
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547916] [<c043f3b9>]
> print_usage_bug+0x140/0x14a
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547919] [<c0440070>]
> mark_lock+0x12e/0x45b
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547921] [<c0440e47>]
> __lock_acquire+0x43a/0xc1a
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547923] [<c04416a1>]
> lock_acquire+0x7a/0x94
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547926] [<c06339bd>]
> _spin_lock+0x2e/0x58
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547928] [<f0a10df9>]
> dvb_dmx_swfilter_packets+0x1f/0x49 [dvb_core]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547937] [<f091f73a>]
> vpeirq+0xc0/0x130 [budget_core]
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547941] [<c0429915>]
> tasklet_action+0x53/0xa8
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547943] [<c0429815>]
> __do_softirq+0x6f/0xe9
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547946] [<c0407046>]
> do_softirq+0x61/0xc7
> Jan 22 11:00:17 TEMERAIRE kernel: [ 218.547948] =======================
> Jan 22 11:00:18 TEMERAIRE kernel: [ 219.745305] saa7146_i2c_writeout: timed
> out waiting for end of xfer
> --------------------------------------------------------------------------------------------
>
> The same dump occurs with different processes named in the line:
> "startup1.pl/13742 [HC0[0]:SC1[1]:HE1:SE0] takes:", though the rest is
> essentially the same.
>
> Now, I am interpreting this as saying that the demux->lock used in
> dvb_dxm_swfilter and dvb_dmx_swfilter_packets has become inconsistent. I
> think this has happened because one of the locks was taken from a soft IRQ.
>
> Changing the spinlocks to spin_lock_irqsave/restore on that lock object in
> dvb_demux.c has stopped that error message.
>
> I am not an expert in this, but is this the correct interpretation and
> resolution? If so, I'll send a patch. If this is not the correct way of
> fixing this, does anyone have any suggestions?
>
> This is of course using an SMP kernel and I have a Intel Core2 6700 @ 2.66GHz
> processor.
>
Can you replicate the problem when you aren't using videobuf, ie: when
not using the devices that depend on videobuf and video_buf_dvb ?
Regards,
Manu
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