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X-Envelope-From: kraxel@bytesex.org
Date: Thu, 4 Nov 2004 12:29:53 +0100
From: Gerd Knorr <kraxel@bytesex.org>
To: Peter Osterlund <petero2@telia.com>
Cc: linux-kernel list <linux-kernel@vger.kernel.org>,
       Eyal Lebedinsky <eyal@eyal.emu.id.au>
Subject: Re: 2.6.10-rc1 bttv oops in btcx_riscmem_free
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References: <41839BFC.1070302@eyal.emu.id.au> <m3wtx86s07.fsf@telia.com>
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> I have similar problems using 2.6.10-rc1-bk8. Often when I exit
> tvtime, I get "unable to handle kernel paging request" or "unable to
> handle kernel NULL pointer", see below.

Any more hints how to trigger that?  I can't reproduce that on my
machines, neither with xawtv nor tvtime.

Any change when setting the triton=1 or vsfx=1 insmod options (probably
not, but who knows ...)?

> Oct 30 14:12:55 p4 kernel: Call Trace:
> Oct 30 14:12:55 p4 kernel:  [<f8a3203d>] btcx_riscmem_free+0x3d/0x84 [btcx_risc]
> Oct 30 14:12:55 p4 kernel:  [<f8d2fb35>] bttv_dma_free+0x74/0x9f [bttv]

Hmm, I somehow miss either buffer_release or vbi_buffer_release here.
Do you have KALLSYMS enabled?  Does tvtime use video only or vbi as
well?

Can you try to enable debug=1 for the video-buf module?

  Gerd

-- 
#define printk(args...) fprintf(stderr, ## args)
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